Additional part of the Main Practice Book Board Exam Questions 1 Board Exam Question Papers Dhaka Board-2019 Physics: First Paper Time- 25 minutes Creative Multiple Choice Questions Subject Code 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] 1. According to the graph what will 7. be the distance traversed from t = 0s to t = 10s? 12 v(ms– 1 0 2. 3. 4. 5. 6. 5 10 t(sec) a. 60 m b. 50 m c. 40 m d. 30 m If M is the number of complete rotations and N is the number of excess divisions of circular scale of a spherometer and LC is least count, what will be the equation of h? a. h = M + Lc b. h = M N + Lc c. h = M pitch + Lc d. h = M pitch + N Lc A = 2 i + x j – 4 k and B = y i + 6 j – 8 k . What will be the values of x and y if A and B are parallel to each other? a. x = 3, y = 4 b. x = 4, y = 3 c. x = 6, y = 2 d. x = 12, y = 1 Escape velocity i. depends on the mass of a body ii. its value on earth's surface is 11.2 kmn–1 iii. depends on acceleration due to gravity Which of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii If the ratio of three frequencies of sound is 4 : 5 : 6, what is called the musical sound produced by that combination? a. Harmonics b. Triad c. Harmony d. Chord Which is the correct graph of longitudinal expansion Vs weight in the elastic limit? expansion a. expansion b. weight weight expansion c. expansion d. weight weight Physics 1st Paper Text (E.V.) 22a An object of mass 250 kg is lifted 14. up by a crane with a constant A speed of 0.1 ms–1. What is the 0 power of the crane? 0 a. 24500 W b. 2500 W B c. 245 W d. 24.5 W 8. The horizontal range of a projectile In case of vectors A and B in figure thrown at an angle of 45 with i. dot product obeys commutative horizontal axis is 100 m. What will be the maximum height? law a. 14.43 m b. 17.68 m ii. cross product obeys commutative c. 25.00 m d. 43.00 m law 9. If the effective length of a second iii. cross product does not obey pendulum becomes 1.96 times, communicative law what will be its time period? Which of the following is correct? a. 3.92 s b. 2.8 s a. i and ii b. i and iii c. 3.44 s d. 1.4 s c. ii and iii d. ii and iii 10. Which is the parallel axis theorem 15. Unit of Torque is relating to moment of inertia? i. N.m a. I2 = tx + ty b. I = IG + MK2 ii. kgm2s–2 c. I = IG + MK d. I = IG + Mh2 iii. js–1 11. Which graph indicates the trajectory of a body moving with Which one is correct? uniform acceleration from rest? a. i b. i and ii v v c. i and iii d. ii and iii 16. A wheel of kinetic energy 2400J a. b. rotates 602 times per minute. O t O t What will be the moments of inertia of the wheel? v v a. 0.605 kgm2 b. 0.828 kgm2 c. d. c. 1.21 kgm2 d. 76.14 kgm2 O t O t 17. Which is the difference between 12. the actual and measured value k1 k2 called? m a. Absolute error b. Gross error If mass m of the body in the figure is c. Relative error released after pulling then frequency d. Systematise error of oscillation will be 18. Which is correct according to the 1 k1 – k2 a. f = kinetic theory of gases? m 2 a. Collisions between molecules are 1 m inelastic b. f = k1 + k2 2 b. Molecules have no potential energy 1 m c. f = c. Molecules have no kinetic energy k1 – k2 2 d. Molecules have no momentum 1 k1 + k2 19. Work done by the centripetal d. f = m 2 force is 13. a. infinity b. zero Y c. positive d. negative A X 20. Which is the relation between root mean square velocity C and P Q t Pressure P What is the phase difference between the points P and Q of the 3P 3 a. C = b. C = wave shown? P a. b. P 2 c. C = d. C = 3P 3 c. 2 d. 4 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 2 Ans. 21. At the maximum height of 23. Which is the dimension of angular M c. 2 frequency? projectile's trajectory R a. [M0LT] a. velocity is zero M2 d. b. [M0L0T–1] b. potential energy is zero R c. [M0L–1T] c. dot product of velocity and 25. For which characteristics a drop d. [M0LT–1] acceleration is zero of water is spherical? d. cross product of velocity and 24. If mass and radius of the earth are M and R then what will be the acceleration is zero a. Surface tension g 22. The frequencies of two tuning b. Viscosity ratio on the surface of the forks are 260 Hz and 255 Hz G c. Capillarity respectively. How long after they earth? d. Elasticity will produce beats? R a. MR2 b. a. 0.1 sec b. 0.2 sec M c. 0.5 sec d. 0.8 sec 1 a 2 d 3 a 4 c 5 b 6 a 7 c 8 c 9 b 10 d 11 c 12 d 13 d 14 b 15 b 16 c 17 a 18 b 19 b 20 a 21 c 22 b 23 b Creative Essay Type Questions Time 2 Hours 35 Minutes 24 c 25 a Full marks 50 [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] 1. A car driver moving with 40 km per hour in the East direction and see a truck is moving with the double velocity count by hour in the North direction. [Consider East direction in positive x-axis and North direction in positive y-axis.] a. What is postulate? 1 b. Work and torque have same value and unit but they are different quantity. Explain. 2 c. Which direction really the truck is moving on? 3 d. Whether it is possible to determine a vector that is stay vertically on the plane of the truck and car's real velocity stay? Show with mathematical analysis. 4 2. In cricket field, Ripon hit a ball and the ball gets 30 m/s velocity and it travels maximum horizontal distance. At the same time a fielder moves with 10 m/s to catch the ball and distance travels 40 m. [g = 9.8 m/s2] a. What is range of projectile? 1 b. In which time the velocity is maximum in projectile? Explain. 2 c. How much velocity of the ball after 2s? 3 d. Whether the fielder catch the ball before it falls down the ground? Give your opinion with mathematical analysis. 4 3. When the wheel is damaged of a car, the car driver ^ ^ ^ while changing the wheel, he applied F = (8i + 5j 5k) N force on the jack-screw by the range and the distance ^ ^ between the acting point to axis of rotation is r = (i + j ^ k)m. The mass of the car is 2000 kg. At that place the radius of the turn of the road is 5m and width of the road is 3m. The maximum road friction is 40 Nkg–1. a. What is couple? 1 b. What do you mean by radius of gyration 0.9 m when a body is rotating with respect to a fixed axis? 2 c. Determine the torque while the screw is rotating. 3 d. How much higher the outer side of road in compare to a inner side while the car can safely turn the road at the maximum possible velocity in the stem? Analyse mathematically. 4 4. 20m 60 A boy of 25 kg took 2 min to get to the roof by stairs with a body of 3 kg in the mention in the stem. When the body give-up from the roof it falls down the ground by rolling in stairs. a. Define elastic force. 1 b. The angular kinetic energy of the every particles of solid sphere is same but linear kinetic energy is not same Explain. 2 c. How much work done will be happened when the boy took the body in the roof against the gravity force? 3 d. Whether it applicable the law of conservation of mechanical energy after 1 sec by the body free. According to the stem analyse with mathematically. 4 5. Raton is going to his grandfather's home to spend his summer vacation. At that place he sees a pendulum clock. This clock takes time 1 see to move left side to right side. When this clock takes in the mountain peak, it loses 120 sec. [Radius of Earth, R = 6450 km, g = 9.8m/s2] a. What is amplitude? 1 b. How a body gains potential energy? Explain. 2 c. How much height of the mountain according to the stem? 3 d. Which type of necessity should be taken to keep time period unchanged in the mountain peak? Give your opinion with mathematical analysis. 4 6. To take two wire of different materials 'A' and 'B' and length is 200 cm and area of cross section 1 mm2, 10 kg of mass is hanging both of the wires. For this reason length increase for 'A' wire is 7% and 'B' wire is 8%. [g = 9.8m/s2] Physics 1st Paper Text (E.V.) 22b Board Exam Questions 3 a. What is comprehensibility? 1 b. Why the velocity of hot water is greater than the cold water? Explain. 2 c. How much the potential energy of 'B' wire for per unit volume? 3 d. Analyse mathematically according to the stem, the relation between Young's modulus and increasing length by applying equal force on the body. 4 7. Y1 = 100 sin(coot 5x)m In the stem, a wave is moving and it hit any place and again it come back by reflecting, finally it makes a new wave. [All unit express in S.I unit] a. What is phase? 1 b. What do you mean by intensity level 20dB of sound? 2 c. How much the wave length of the wave in the stem? 3 d. Whether it is possible to find out the position where the maximum amplitude create for the new wave in the stem. Analyse mathematically. 4 8. A balloon is filled up 168g Nitrogen gas and when it goes to the bottom in the sea its volume turns half. Surface pressure in sea, air pressure and temperature 30C and bottom level temperature 14C. [Density of water is 1025 kg/m3, g = 9.8m/s2, R = 8.314 J/mol/K] a. What is rate of independence? 1 b. What do you mean by dew point temperature at any place is 18C? 2 c. Determine the kinetic energy of the Nitrogen gas at the sea surface. 3 d. Whether it is possible to determine the height of the lake by considering the change of temperature. Analyse mathematically. 4 Rajshai Board-2019 Physics: First Paper Time- 25 minutes Creative Multiple Choice Questions Subject Code 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] 1. 2. 3. The magnitude of least count of a Screw gauge is 0.01 mm. What minimum thickness can be measured by it? a. 1 mm b. 0.10 mm c. 0.01 mm d. 0.001 mm If the size of the earth suddenly reduces and its radius becomes half of the previous then the magnitude of the gravitational acceleration will change. How many times will be the changed value of acceleration? a. 2 times b. 4 times c. 6 times d. 8 times A stone of mass 100 gm comes to the point B from the point A by moving in a vertical plane of radius 10m (fig-1). What will be the change of energy? B 4. 5. 6. 7. r= 10m a. 10J c. 30J A Fig-1 b. 20J d. 40J iii. Cross product does not obey the law of exchange rule Which one is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 9. It can be said to the mutual attractive m1 = 10kg m2 = 20kg forces between the different particles If the two bodies joined together of substances that by collision then what will be the a. surface tension velocity of the combined body? b. addisive force 5 –1 7 –1 a. ms b. ms c. cohesive force 3 3 d. viscus force 8 –1 10 –1 c. ms d. ms 10. The causes of change of 3 3 gravitational acceleration are Determining the magnitude of 'g' i. shape of the earth with a simple pendulum we get ii. diurnal motion 10ms–2. If the actual value of 'g' at iii. annual motion that place was 9.81ms–2 then what Which one is correct? will be the error of measurement a. i and ii b. i and iii in percentage? c. ii and iii d. i, ii and iii a. 19.36% b. 19% 11. The characteristics of a simple c. 1.93% d. 0.193% harmonic oscillations are The dimension of Gravitational i. motion is periodic constant is ii. acceleration is inversely a. M–1L–2T–2 b. M–1L–3T–2 proportional to displacement c. M–1L–1T–2 d. M–1LT–2 iii. linear motion The liquids which do not wet the Which one is correct? glass, their angle of contact will be a. i and ii b. i and iii a. 0 b. 90 c. ii and iii d. i, ii and iii c. less than 90 d. greater than 90 It can be said about the cross 12. Vibration is created to a body, this vibration in air product of two vectors that i. propagates by adiabatic process i. Cross product is a vector quantity ii. propagates by the extension and ii. The direction of the cross product construction of air medium is perpendicular to that plane of iii. creates simple harmonic motion the vectors Look at the picture and answer the question no. 4 : u1 = 15ms–1 u2 = 5ms–1 8. Panjeree HSC English Version Test Papers Made Easy Physics First Paper 4 Ans. Which one is true? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 13. The true value of R at normal temperature and pressure is a. 8.31 JK–1mol–1 b. 8.30 J–1Kmol–1 c. 8.31 JK–1mol d. 8.13 J mol–1K–1 14. Difference in the reading of two thermometers in humidity measuring instrument i. if decreases suddenly there is a probability of storm ii. if decreases slowly then there is probability of rain iii. if becomes very small then it is the probability of dry weather Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii Read the stem and answer the question no. 15 : Tahmid and Tamal are two students of class seven. They ascended on the roof of school building of height 15m by running from ground floor. At this they needed time 6 sec. and 5 sec. respectively and their masses are 60 kg and 50 kg respectively. 15. Two of them i. Tahmid has done more work ii. Tamal has done less work iii. Tamal has applied more power Which one is true? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 16. How many times more is the Boltzmann constant in C.G.S unit than SI unit? a. 10–7 b. 107 c. 10–5 d. 105 1 14 c a 2 15 b a 3 16 Time 2 Hours 35 Minutes b a 4 17 a c 17. If two similar vectors A and B act 21. Which graph is applicable for Boyle's law? at the same time and at same point PV PV then a. b. i. A.B = 0 V ii. A B = 0 iii. |A| + |B| = A + B Which one of the following is correct? a. i b. i and ii c. ii and iii d. i, ii and iii 18. If time is t, x = 6t and y = 8t – 5t2 what will be the velocity of projection of the projectile? a. 10 ms–1 b. 5 ms–1 c. 6 ms–1 d. 8 ms–1 19. What is the linear velocity of the terminal point of minute-hand whose length is 0.01m? a. 1.54 10–5ms–1 b. 1.64 10–5ms–1 c. 1.74 10–5ms–1 d. 1.84 10–5ms–1 20. If a elastic collision will occur between two bodies then i. the total momentum will remain the same before and after collision ii. the total kinetic energy will remain the same before and after collision iii. the two velocities will be exchanged after collision. Which one of the following is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 5 18 c d V P P 6 19 b c 7 20 d d 8 21 a b c. d. v V 22. If the frequency of the overtone is twice the frequency of the fundamental tone then it is called a. Melody b. Musical interval c. Musical scale d. Octave Read the following stimulus and answer question no 23 : A body is thrown from the top of a tower of 180m height. At the same time another body is thrown vertically upward with velocity of 60ms–1. 23. When will the bodies meet? a. 1 sec b. 2 sec c. 3 sec d. 4 sec 24. A football is kicked with a velocity at an angle 30 with the horizontal line. What will be the velocity of the football after 2 sec.? a. 30.64 ms–1 b. 32.64 ms–1 c. 34.64 ms–1 d. 36.64 ms–1 Read the stem and answer the question no. 25 : At a children park a child is swinging in a cradle. Suddenly it saw its mother and stood up. 25. What change will occur to the cradle pendulum? a. Will go slow b. Will go fast c. Will stop d. Will go fast at first and then go slow 9 22 b d a c 10 23 d c 11 24 Creative Essay Type Questions 12 25 d 13 a b Full marks 50 [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] 1. A bus is ascending up a hill with uniform velocity 72 km/h over as plane inclined at an angle 30. Suddenly it starts to rain falling vertically downward with a velocity 6 m/d. When the rain is about to stop, wind starts to flow horizontally. a. Define reciprocal vector. 1 b. The magnitude of sum and difference between two vector is the same Explain. 2 c. Calculate the angle at which the bus driver will see the rain falling. 3 d. Due to wind flow, if the driver sees the rain falling vertically downward, then mathematically estimate the direction and magnitude of wind velocity. 4 2. 20 15 S (m/s) B A 10 5 0 2 4 6 C 8 1(min) The above graph represents the velocity of a car during first 10 minutes of its journey. a. Define spring constant. 1 b. Though there is no flow of wind, a bicycle rider experiences a wind flow Explain why? 2 c. According to the physical concept of average velocity calculate the average velocity of the car during first four minutes of its journey. 3 Board Exam Questions 5 d. "The total distance traversed by the car in 10 min is mathematically equal to the area under the curve." Verify the statement mathematically. 4 3. The dimension of a swimming pool is 25m10m3m and is filled with water. A water pump of power 1hp can empty the pool in 30 minutes while another water pump of power 1.5hp can empty it in 15 min. a. Define 'horse power'. 1 b. In cricket, a fielder draws his hands backward while taking a catch Explain why? 2 c. If both the pumps are used together how long it will take to empty the pool? 3 d. Use of which water pump will be more cost effective? Explain mathematically. 4 4. The time period of a simple pendulum at a place on earth surface is 2s and acceleration due to gravity is 9.81m/s2. If the pendulum is placed on the top of a mountain B close to another mountain having height 8.85 km and oscillated, it performs 1780 oscillations in an hour. a. What is strain? 1 b. An oscillating pendulum doesn't stop at the position of equilibrium Explain why? 2 c. Calculate the effective length of the pendulum. 3 d. Mathematically infer whether the height of mountain B is greater than its adjacent mountain. 4 5. A solid cylinder and a sphere of equal volume, material and radius of 0.510–2m are dropped simultaneously in water. The density of water and material of the objects are 1000 kg.m–3 and 7800 kg/m3. The coefficient of viscosity of water is 0.001 kg.m–1s–1. a. What is capillarity? 1 b. A hydrogen gas balloon explodes after achieving a certain height from surface Explain why? 2 c. If the cylinder falls vertically downward then calculate its terminal velocity. 3 d. Mathematically explain, the cylinder or the sphere, which one will experience greater viscous force? 4 6. 4 A B 1m 15 cm 2m C A bob of mass 100g and diameter 1cm is suspended from a rigid support with a thread of length 99.5cm. The pendulum is released from A. A basket is placed at position C. a. What is phase of an oscillator? 1 b. If the time period of the pendulum of a clock is 2.5s then explain whether it will explain time correctly or not. 2 c. Calculate the maximum angular speed of the bob. 3 d. If the thread tears while the bob is at B then mathematically explain the possibility that the bob will drop in the basket. 4 7. Equation of an wave is defined as y (x, t) = 3sin (36t + 0.018x + ). 4 a. What is a spring constant? 1 b. Explain why the walls of an auditorium are covered with hard board. 2 c. Calculate the time period of the wave. 3 d. Explain the velocity versus, time graph of the wave with mathematical analysis and considering x = 0. 4 8. Temperature of water at the bottom and on the surface of a lake is 8C and 30C. An air balloon of volume 2L released from the bottom of the lake. The maximum expansion capability of the balloon is 15L. Consider air pressure on the surface of lake 105 N.m–2, depth of lake 15m and density of lake water 1000 kg/m3. a. Define 'ideal gas'. 1 b. Boltzmann constant K = 1.38×10–23J/K Explain what is meant by that. 2 c. Calculate the change in kinetic energy of the air molecules enclosed in balloon. 3 d. Mathematically explain whether the balloon will explode or not while surface the lake water. 4 Dinajpur Board-2019 Physics: First Paper Time- 25 minutes Subject Code Creative Multiple Choice Questions 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] 1. 2. 3. Dimension of energy is a. MLT–2 b. ML–2T2 c. ML–2T d. ML2T–2 Which one of the following is a longitudinal wave? a. Radio wave b. Spring wave c. Sound wave d. Stretched string wave 4. [*N.B: Both b and c are correct.] In case of geostationary satellite i. its orbit lies on the equatorial plane of the earth ii. rotates from the west to the east iii. rotates at the velocity equal to the 5. escape velocity of the earth Which one of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii What is the work done to make an object of mass 20 kg to move with a velocity 10ms–1 on frictionless surface from rest? a. 200J b. 1000J c. 2000J d. 4000J According to the figure given below, what is the projection of P on Q? P → Q Panjeree HSC English Version Test Papers Made Easy Physics First Paper b. PQ Q P.Q PQ d. P P Read the following stem carefully and answer the question nos. 6 and 7 : A car of mass 1500 kg moves straight with acceleration 5ms–2 against frictional force 400N. 6. Force exerted by the engine of the car is a. 0.4 KN b. 7.1 KN c. 7.5 KN d. 7.9 KN 7. If the car in stem is moving uniform velocity instead of acceleration then the graph between force exerted by engine and time will be c. F (KN) a. 0 b. 0 0 t (time) c. F(KN) 0.4 0 8. 9. F(KN) 0.4 d. t (time) t t (time) t F(KN) 0.4 0 t (time) t Which one below is observational error? a. Zero error b. Back lash error c. Parallax error d. Level error Equation for 'g' at 0 latitude on the earth surface is [Mass and radius of the earth are M and R respectively.] GM a. g = 2 – 2Rcos2 R GM b. g = 2 – 2Rcos R GM c. g = 2 – Rcos2 R GM d. g = 2 – Rcos R 10. C A B According to stem which one is correct for ABC? → → → a. AB – AC = BC → → → b. AB – AC = CB → → → c. AB + AC = BC → → → d. AC – AB = CB Water drops are falling down to the ground at an equal interval from a tap placed at the height of 45m. The fourth drop of water is likely to fall from the tap when the first drop falls down on the ground. [g = 10ms–2] Answer question nos. 11 and 12 from the stem : 11. At what height will the third drop be situated at the time of falling down of the first drop on the ground? a. 10 m b. 15 m c. 20 m d. 25 m [* N.B: Correct answer : 40m.] 12. At the moment of falling down of the first drop on the ground the ratio of velocity of third drop to that of the second drop will be a. 4 : 1 b. 2 : 1 c. 1 : 2 d. 1 : 4 13. In case of Poisson's ratio i. it has no unit ii. its value lies between –1 and 0.5 iii. it has a fixed value for a specific material Which one of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 14. Intensity of sound at 2 km away from source of a sound with 20 watt of power will be a. 3.98 10–7 Wm–2 b. 1.59 10–6 Wm–2 c. 5.0 10–6 Wm–2 d. 1.59 10–3 Wm–2 15. The relation between linear → → velocity v and angular velocity w is → → → → → → a. w = v + r b. v = w . r → → → → → → c. w = v . r d. v = w × r 16. A pendulum clock i. moves slow on a hill ii. moves slow when it is taken from equatorial region to polar region iii. moves fast in winter than in summer Which one of the following is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 17. The unit for impulse of force is 2 –2 a. kgm s b. kgm2s–1 –2 c. kgms d. kgms–1 18. In case of saturated vapour 1 2 i. = P1T1 P2T2 ii. = constant, when T is constant T iii. it obeys both Boyle's and Charle's law Which one of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 19. If wavelength is , what is value of x? B A x 3 5 b. 4 4 7 9 c. d. 4 4 In the figure, a graph of longitudinal stress Vs longitudinal strain for a metal wire is shown. a. –2 P.Q Q (Nm ) a. Longitudinal stress 6 4.8 1010 3.6 10 10 0 S (Breaking limit) P 0.2 Longitudinal strain Answer question nos. 20 and 21 according to the stem : 20. What is the Young's modulus of material of the wire? a. 7.2 109 Nm–2 b. 3.6 1010 Nm–2 c. 4.8 1010 Nm–2 d. 1.8 1011 Nm–2 21. Stress on the wire i. the wire will be torn off if the value is greater than 4.81010 Nm–2 ii. the wire will undergo permanent deformation if the value is 4.21010 Nm–2 iii. there will be no strain if the value is less than 3.61010 Nm–2 Which one of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 22. A displacement versus time graph of a particle oscillating in simple harmonic motion is shown. Displacement (x) A A 0 Time (t) What is the initial phase of the particle? a. c. b. 2 d. 0 4 Read the stem carefully and answer the question nos. 23 and 24 : The acceleration due to gravity of a 1 1 certain planet is g and its radius R. 5 4 Here, g is acceleration due to gravity of the earth and R is the radius of the earth. Board Exam Questions 7 Ans. 23. What is the escape velocity of the 24. If an object of weight 588 N is 25. Which of the following is correct taken away from the earth to that where root mean square velocity planet? planet, how much weight the of the gas molecules is Crms and a. 0.56 kms–1 object will lose? absolute temperature is T? b. 0.74 kms–1 a. 60.0 N b. 117.6 N c. 2.50 kms–1 a. Crms T b. Crms T d. 5.60 kms–1 1 1 c. 470.4 N d. 528.0 N c. Crms d. Crms T T 1 14 b a 2 15 * d 3 16 a c b d 4 17 5 18 a c 6 19 d d 7 20 a d c a 8 21 9 22 a b 10 23 b c 11 24 * c 12 25 c 13 d b Time 2 Hours 35 Minutes Full marks 50 Creative Essay Type Questions [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] 1. Three forces act on a body of mass 2 kg at a point O for 4s according to the figure-1. Later only 5N and 6N forces is acting on the same body for 4s. 6N 120 90 5N 2N O a. What is curl? 1 b. In a curve part of road why the outer end is kept higher than inner end? Explain it. 2 c. Determine the magnitude of resultant force acting on the body for the first 4s. 3 d. Will the direction of resultant force for both the cases be same? Analyze mathematically and give your opinion. 4 2. A projectile reaches at point P after 1s according to ^ ^ the figure. Here OP = (10i + 12j) m. The height of P and Q point of the projectile will be same. Y P O Q X a. What is called spring constant? 1 b. At which condition the angular momentum of a rotating body will be zero? Explain it. 2 c. Determine the angle of projection of the projectile. 3 d. Will the kinetic energy at point P and kinetic energy for maximum height of the projectile be same or not? Analyze mathematically and give your opinion. 4 3. Name of Distance from the Mass Radius sun planet 23 Mars 6.39 10 kg 3390 227.9 106km km Earth 5.97 1024kg 6378 149.6 106km km Gravitational Constant, G = 6.673 10–11Nm2kg–2. a. What is called elastic collision? 1 b. Does the escape velocity of a planet depend on its radius? Explain it. 2 c. Determine the acceleration due to gravity on the surface of Mars. 3 d. Will the escape velocity of the body for both planets be same or not? Analyze mathematically and give your opinion. 4 4. Two different wires are taken having length 2m and diameter of cross-section 0.8 mm. In case of first wire, within elastic limit a graph of stress versus strain (figure-1) out of these two wires, and in case of second wire a graph of total stored energy versus (increase length)2 (figure-2) are shown below : Stress 13 2 10 Nm Stored Energy 2 0.7 1011J O 102 Fig-1 Strain (Length increment)2 O 4m2 Fig-2 a. What is elastic fatigue? 1 b. What is meant by the positive Poisson's ratio? 2 c. What will be the maximum stored energy in the first wire according to figure-1 within elastic limit? Calculate it. 3 d. Which one will be more elastic between two wires? Explain with mathematical analysis. 4 5. The length of a spring increases 2cm due to application of 80 gm mass and increases its length 8cm due to 600 gm mass. Aroni observed 1cm length expansion from its equilibrium position of the above spring. a. What is called centripetal acceleration? 1 b. For circular motion why does the work done made by centripetal force is zero? Explain it. 2 c. Determine the magnitude of spring constant. 3 d. What type of change of potential energy was observed by Aroni for both the masses in case of the spring? Analyze mathematically and give your opinion. 4 6. A uniform disc (figure-2) is made by a uniform bar (figure-1). P P 60 cm B A m = 0.5 kg Q Fig-1 Q Fig-2 a. What is called range of a projectile? 1 b. On which factors intensity of sound depend? Explain it. 2 c. Determine the moment of inertia of figure-1 with respect to PQ axis. 3 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 8 d. Will the moment of inertia be different or not if the circumference of the disc is equal to the length of the bar? Analyze mathematically and give your opinion. 4 7. At room temperature in a definite place a cylinder of volume 0.6m2 is filled up with 800 gm methane (CH4) gas with pressure 202650 pa. A teacher said to his students that the dew point of this place is 11.5C and there is a possibility of rain if the relative humidity of that place is more than 60%. At 11C, 12C, 19C and 20C the saturated vapour pressure are 9.84 mm (Hg), 10.52 mm (Hg), 16.46 mm (Hg) and 17.54 mm (Hg). The molecular mass of methane is 16 gm/cc. a. What is called intensity level of sound? 1 b. Does the kinetic energy of a projectile be minimum at its maximum height? Explain it. 2 c. Determine the room temperature of that place. 3 d. Is there any possibility of raining at the place of the stem? Represent it by mathematical analysis. 4 8. The equation of a sound wave produced by a tuning fork 'A' is y = 0.7sin(500t – 1.47x). All quantities mentioned in this equation are expressed in S.I unit. Another tuning fork 'B' made unison with the fundamental note created by the wire of sonometer having length 0.25m. The wire of the sonometer is pulled with a force 5 kg.wt and the mass of the length 1 m wire is 3 gm. a. What is called Poisson's ratio? 1 b. Will the acceleration of a simple harmonic motion be maximum or not at height position? Explain it. 2 c. What is the wavelength of the sound created by the tuning fork 'A'? Calculate it. 3 d. Will it be able to hear beat if 'A' and 'B' are vibrated together? Analyze it. 4 Cumilla Board-2019 Physics: First Paper Time- 25 minutes Subject Code Creative Multiple Choice Questions 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] 2. 3. 4. 5. In case of ideal gas, each molecule 6. independence rate is a. 2 b. 3 c. 4 d. 5 Unit of force of impulse 7. a. N b. Nm c. Nm–1 d. Kgms–1 Critical velocity = Vc , coefficient of viscosity of liquid = , density of liquid = , radius of the pipe = r, 8. so which graph is correct? Which one is the smallest unit? a. Mili micron b. Angstrom c. X-ray unit d. Auto-meter Which one is a transverse wave? a. Bashy tunes b. Creates waves in spring c. Water wave d. Sound wave How much are the angles between cycling velocity and wheel friction? Vc Vc a. 0 b. 90 b a. c. 180 d. 360 . 9. A circular measurement radius (5 p 1/r 2%) cm then how much is the Vc Vc percentage of the area measurement? d c. a. 0.8% b. 0.5% . 1 p c. 0.4% d. 0.2% [*N.B: Correct answer is 4%] 10. If the wave length is then what is [*N.B: Both a and b are correct.] the distance between note points The relation between momentum with three consecutive times? and kinetic energy is a. /2 b. p. p c. 3/2 d. 2 i. K = 2m 11. If the distance from the Earth to p2 Sun is two-thirds of the current ii. K = 2m distance, then how many days needs to make a year? [One year pp iii. K = on Earth = 365 days] 2m a. 108.15 days Which one is correct? b. 121.66 days a. i and ii b. ii and iii c. 198.68 days d. 243.33 days c. i and iii d. i, ii and iii The braking stress depends on 12. If the angle between A and B is 0 wires then the vertical projection on A by a. on radius b. on length B c. on material a. Asin b. Acos d. on shape of cross section c. Bsin d. Bcos 13. Which graph shows the second law of simple pendulum? T2 T2 b . a. L L T2 T2 d . c. L ^ L ^ ^ ^ 14. If F = (2 i + 3j) N and r = (3 i + 4j ^ 2k) m then W=? [ All symbols present as usual meaning] a. 4J b. 18J c. 20J d. 22J 15. Dimension for Young's co-efficient a. [ML–1T–2] b. [MLT–1] c. [M–1L–1T–2] d. [M–2L–1T–1] 16. The rotational period of geostationary satellites a. 1 hour b. 24 hours c. 30 hours d. 36 hours 17. Intensity of a wave is i. proportional to the density ii. square proportional to the amplitude iii. proportional to the frequency Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 18. The graph shows the motion of an object as follows : V ms–1 1. 5 O B C 5 10 tiss i. the object moves in uniform acceleration in OB part Board Exam Questions 9 Ans. ii. acceleration zero in BC part iii. the object travels 62.5m distance in 10 sec Which one is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 19. In the field of work by the force a. 0 < 90 b. 90 < 180 c. 0 < 90 d. 90 < 180 20. The secretation sound of violin is i. tune ii. vocal iii. orchestra Which one is correct? a. i b. ii c. i and iii d. ii and iii 1 14 b b 2 15 d a 3 16 * b 4 17 a a 21. How much the decreasing radius 24. How much the minimum running of the wire if the increasing length velocity needs a fielder will be able is 0.25 mm and initial length and to catch the ball before it return to the ground where of the fielder radius are 2m and 2mm? ( = 0.2) who is 80m away from the a. 5 10–3m b. 2.5 10–3m batsman? c. 5 10–8 d. 2.5 10–8m a. 9.72ms–1 22. Gravitational unit of work is b. 11.22ms–1 a. Kgm b. Nm c. 31.37ms–1 d. 36.23ms–1 c. Nm2 d. Kgm2 According to the stem answer the 25. If the contact angle is 0 i. for glass and water 0 < < 90 questions no. 23 and 24 as follows : ii. for mercury and glass 0 < < 180 Isam hit a cricket ball of velocity 25 ms–1 iii. for glass and kerosene 0 < < 90 by bat and it makes angle is 30. [g = Which one is correct? 9.8ms–2] a. i b. ii 23. How long will the ball return to c. i and iii d. i, ii and iii the ground? a. 1.27 sec b. 2.21 sec c. 2.55 sec d. 5.10 sec 5 18 c a 6 19 d a 7 20 c b 8 21 b c 9 22 * a 10 23 b c 11 24 c a d 13 c c 12 25 Time 2 Hours 35 Minutes Full marks 50 Creative Essay Type Questions [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] 1. A bus of mass 1000 kg is moving with kinetic energy 78125J on a road and suddenly faced a turn which radius of curvature is 145m, shown in the figure below : C 20 m 45 30 7m 0.3 m a. What is impulse of force? 1 b. Is the motion of the needle of hand watch is harmonic motion? Explain it. 2 c. Determine the momentum of the bus. 3 d. Will the bus be able to cross the turn of the road safely without reducing velocity? Analyze mathematically and give your opinion. 4 2. A diver can search up to 6m depth in water without oxygen cylinder. In upper surface of water 'A' the volume of a gas filled balloon is 10–3 m3 at pressure 105 Pa. The balloon is immersed in water and volume becomes 5 × 10–4 m3 at point 'B'. (The density of water = 103 kgm–3, Acceleration due to gravity = 9.8 ms–2) a. What is shearing strain? 1 b. Which one is more important between absolute humidity and relative humidity? Explain it. 2 c. Determine the kinetic energy of the gas in the balloon. 3 d. Will the diver be able to continue searching at 'B' placed of the stem without oxygen cylinder? Analyze mathematically and give your opinion. 4 3. The peak point of two inclined planes AC and BC is C, the position of two iron spheres each mass 2 kg is shown in the figure below. The length of AC plane is 20 m : C D B a. What is elastic collision? 1 b. When will the acting torque on a body be zero? Explain it. 2 c. Determine the total energy of two spheres at point 'C'. 3 d. The two spheres of the stem is released at a time, will it reach on the horizontal plane 'AB' at the same time? Explain it mathematically. 4 4. Manha pulled a horizontally floating wire of length 5 cm vertically upward from the surface of water. Later an iron sphere is released into water and measured terminal velocity. After that, the temperature of water is increased and releasing the same sphere and measured terminal velocity. a. What is compressibility? 1 b. Intermolecular distance is greater than at equilibrium, the molecules gain attractive or repulsive force Explain it. 2 c. What amount of force will be applied by Manha to pull the wire upward? Calculate it. 3 d. In which case of the stem terminal velocity will found more? Analyze it mathematically and give your opinion. 4 5. When a bus started moving at the same time a passenger runs to catch the bus lacking behind 16m from the bus. The graph of the passenger and the bus versus time are given below : Panjeree HSC English Version Test Papers Made Easy Physics First Paper 10 Velocity (ms1) Velocity (ms1) 10 8 6 4 2 0 1 2 3 4 5 7. 10 B 8 6 4 500 m 2 120 0 6 1 Time (s) Figure : Time -Velocity graph of bus A 2 3 4 5 Time (s) 90 6 Figure : Time -Velocity graph of the passenger a. What is escape velocity? 1 b. Is the velocity of a bob mininimum at equilibrium position in case of simple harmonic motion? Explain it. 2 c. Determine the distance travel by the bus in 4s. 3 d. Will the passenger be able to catch the bus of the stem? Analyze mathematically and give your opinion. 4 6. Abir brought a second pendulum from a place of acceleration due to gravity 9.81 ms–2 at a depth in mine and at the apex of a hill and observed, the pendulum moves 30s slow per hour at both the place. Abir's friend Zesan said, it is possible to determine the height of the hill from those information. [Radius of the earth R = 6.4 × 106 m] a. What is dew point? 1 b. Explain the relation with the density of a liquid and angle of contact. 2 c. Determine the time period of the pendulum inside the mine. 3 d. Determine the correctness of Zesan's statement with mathematical analysis. 4 O Water current = 1 ms1 The velocity of Karim along OB = 8ms–1 and the velocity of Rahim along OA = 7.5 ms–1 a. What is divergence? 1 b. All co-linear vectors are not equal vectors. Explain it. 2 c. What will be the velocity of Karim to reach the other side of the river calculate it. 3 d. Who will reach first other side of the river between Rahim and Karim? Analyze mathematically and give your opinion. 4 8. Two tuning forks A and B are sounded in a laboratory, the wave that is produced is shown in the figure below using graph : 3.2 m TA = 0.01S Figure : Waves emitted from A tuning fork 3.05 m Figure : Waves emitted from B tuning fork a. What is cohesive force? 1 b. The Young's modulus of a thick and thin wire will be same or not? Explain it. 2 c. What is the velocity of sound created by tuning fork 'A' in the laboratory? Calculate it. 3 d. Will the two tuning forks of the stem be able to produce beat if it is sounded together? Explain it mathematically. 4 Chattogram Board-2019 Physics: First Paper Time- 25 minutes Creative Multiple Choice Questions Subject Code 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] 1. 2. 3. 4. Which of the following is longitudinal wave? a. Wave in water b. Sound wave c. Light wave d. Radio wave Which quantity of the following is numerically equal with impulse of force? a. Change of angular momentum b. Change of linear momentum c. Moment of inertia d. Torque Absolute temperature a. – 273 K b. 0C c. – 273C d. 273 K ^ ^ ^ What is the value of ( i + j).k? ^ ^ a. i b. j c. 0 d. 1 5. Which is the relation between Which one of the following is linear momentum (P) and kinetic correct? energy (k)? a. i and ii b. i and iii [Here m = mass] c. ii and iii d. i, ii and iii km a. P = b. P = 2km A 2 km c. P = 2 km d. P = 2 B Read the following stem and answer M N the question nos. 6 and 7 : A body is thrown with an angle of 30 Answer the question number 8 and 9 –1 and velocity of 50 ms from the ground. according to the above stem : 6. What is the velocity of the body 8. Which are the applicable for the after 2 second? above stem? a. 62.6 ms–1 b. 43.63 ms–1 i. It is a stationary wave c. 31.89 ms–1 d. 5.4 ms–1 ii. Produced from to progressive 7. For the projectile of the stem i. horizontal range is 220.92 m waves ii. maximum height is 63.77 m iii. Energy of one loop transfer to iii. vertical component of velocity at another loop maximum height is zero Board Exam Questions 9. 10. 11. 12. 13. Ans. 14. 11 Which one of the following is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii If MN = 40 cm, then AB = ? a. 20 cm b. 10 cm c. 5 cm d. 2.5 cm What is the relation between escape velocity and radius of the planet when acceleration due to gravity is constant? a. Proportional b. Inversely proportional c. Square root proportional d. Inversely proportional to square root Which of the following is derived quantity? a. Frequency b. Mass c. Time d. Temperature When a rigid body rotates with a uniform angular velocity, the ratio of kinetic energy and moment of inertia is a. proportional to angular veloity b. proportional to square of angular velocity c. proportional to linear velocity d. proportional to square of linear velocity According to unit and dimension which pairs are unique i. work and surface energy ii. surface tension and surface energy iii. horizontal range and displacement Which one of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii What will be the spring constant when 5N force expands the spring to 10 cm? a. 0.5 Nm–1 b. 2 Nm–1 c. 50 Nm–1 d. 250 Nm–1 1 14 b c 2 15 b * 3 16 c a 4 17 c c 15. Calculate the kinetic energy of 21. Which of the following is 7gm nitrogen gas at a temperature dimensionless? a. Strain of 30C [Gram atomic mass of b. Stress nitrogen is 28 gm] c. Young's modulus a. 125.55J d. Modules of rigidity b. 128.62J 22. A wire of length of 1m is increased c. 133.62J in length of 0.001m by a stress of d. 14958.00J 105 Nm–2. What is the Young's [*N.B: Correct answer is 944J.] modulus? 16. Which of the following figure a. 10–7Nm–2 b. 10–3Nm–2 shows the linear momentum (P) vs c. 107Nm–2 d. 108Nm–2 kinetic energy (Ek) at a constant 23. When a particle oscillates with a mass? simple harmonic notions? Ek Ek b [All the symbols have their usual a. . meanings] P P 1 Ek Ek i. Potential energy Ep = kA2sin2 2 d c. (t + ) . P P 1 ii. Kinetic energy Ek = kA2cos2 17. Who is the father of quantum 2 theory? (t + ) a. Thomas Young iii. Total energy E A2 b. Ernest Rutherford Which one of the following is c. Max Planck correct? d. Albert Einstein a. i and ii b. i and iii 18. What is the angle between a vector c. ii and iii d. i, ii and iii and its unit vector? 24. Which of the following figure a. 180 b. 90 shows the square of time period c. 45 d. 0 (T2) versus effective length of a 19. What is the dimension of velocity? simple pendulum? –1 –1 a. LT b. L T 2 T2 c. L2T d. L2T–1 b T a. . 20. For torque ( ) O O L L i. = l a 2 T T2 d c. ii. = r F . O O L L dL ^ ^ ^ ^ ^ ^ iii. dt 25. A = 2 i + 5j k, B = p i j + 3k. Which one of the following is For which value of p, when A and correct? B will be perpendicular to each a. i and ii other? b. i and iii a. – 4 b. –1 c. ii and iii c. 4 d. 5 d. i, ii and iii 5 18 c d 6 19 b a 7 20 b d 8 21 a a 9 22 b d 10 23 c d 11 24 a a 12 25 b 13 c c Time 2 Hours 35 Minutes Full marks 50 Creative Essay Type Questions [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] ^ ^ 1. Three vector quantities are respectively A = 4i + 3 j ^ ^ ^ ^ 2 ^ ^ 2 ^ + 5k, B = 2i + j + 2k and C = x yi + y2 = j + z xk. a. What is called rectangular unit vector? 1 b. The cork of a bottle can be opened or closed with the help of the right hand rules of the screw Explain it. 2 c. Calculate a unit vector perpendicular to the vectors A and B of the above stem. 3 d. Will the divergence of curl of the vector C of the above stem be zero? Analyze it mathematically. 4 2. Two fountains are placed at two sides of the entrance to make a science fair attractive. From one of them, the waterdrops are scattering with a velocity 5 ms–1 and angle 60. In case of other fountain, the water drops are scattering with a velocity 6 ms–1 and angle 30. a. What is projectile? 1 b. Why can't a sprinter run in uniform velocity on a circular track? Explain it. 2 c. Calculate the velocity of a water drop of the 1st fountain after 0.6 sec. 3 d. From which fountain water scatters in more area? Explain it mathematically. 4 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 12 3. Rahim tied a body of mass 200 g to one end of a string of length 80 cm and made 90 rotations per minute by holding another end. On the other hand Karim tied a body of mass 150 g to one end of a string of length 60 cm and made 120 rotations per minute in the same way. a. What is called moment of inertia? 1 b. Will the collision be elastic if the two bodies combine after collision? Explain it. 2 c. Calculate the angular momentum of the body rotated by Rahim. 3 d. Did Rahim and Karim get equal tension of string in the above cases of the stem? Explain it mathematically. 4 24 4. The mass and radius of the earth are 6 × 10 kg and 6400 km respectively. The acceleration due to gravity on the earth surface is 9.8 ms–2 and the gravitational constant is 6.673 × 10–11 Nm2kg–2. A satellite has been sent to a height of 700 km from the earth surface. a. What is called geo-stationary satellite? 1 b. Will the acceleration due to gravity be change with the change of density of the earth? Explain it. 2 c. At what height from the earth surface the weight of the satellite will be 80% of that on the earth surface? Determine it. 3 d. Will the satellite of the stem be a satellite like the moon? Explain mathematically. 4 5. In a lab Rafi was verifying a wire whether it was made of steel. For this he took a wire of length 2m and of diameter 1.12 mm. The elongation of the wire is 3 cm and contraction of the diameter is 5×10–3mm if 25J potential energy is applied. (Young's modulus of pure steel is 2 × 1011Nm–2). a. What is viscosity? 1 b. If the same amount of oil and glycerine is kept on the glass surface which will cover more area? Explain it. 2 c. Calculate the Poission's ratio for the wire of the above stem. 3 d. Was the wire used by Rafi made of steel? Analyze it mathematically. 4 6. The time period of a simple pendulum in a place is 1.8 sec. The acceleration due to gravity at that place is 9.8 ms–2 and the radius of the earth is 6400 km. After that, the simple pendulum is taken to the top of a hill of height 712 km. a. What is spring constant? 1 b. "Force constant is 2500 Nm–1" Explain its meaning. 2 c. What will be the time period of the above pendulum if the effective length is increased 40%? Determine it. 3 d. Will the pendulum of the above stem be second pendulum at the top of the hill? Give opinion mathematically. 4 7. Three tuning forks P, Q and R are kept in same medium. 4 complete wavelengths of P is equal to 5 complete wavelengths of Q. The difference of frequency between them is 60 Hz. But the equation of the progressive wave created by tuning fork R is Y = x 0.2sin2 100t – m. 15 a. What is resonance? 1 b. Musical sound keeps mind safe by creating mental peace Explain it. 2 c. Calculate the frequencies of tuning forks P and Q of the above stem. 3 d. What step should be taken to get a stationary wave by the wave of R tuning fork? Analyze it mathematically. 4 8. There is 24g O2 gas in a balloon at a temperature of 30C and at 2 atm pressure. Mass of 1 mole O2 is 32g. On the other hand atmospheric pressure above a pond surface is 1.5 atm, density of water is 1050 kgm–3, and depth of the pond is 20 m. Atmospheric pressure above another pond surface is 1.2 atm, density of its water is 1000 kgm–3 and its depth is 25m. [1 atm = 1.013 × 105 Pa, R = 8.314 Jmol–1 K–1 and g = 9.8 ms–2] a. What is saturated vapour pressure? 1 b. The density of a gas of specific mass is dependent on its absolute temperature Explain it. 2 c. Calculate the volume of the gas enclosed by the balloon in the stem. 3 d. In which ponds bottom the volume of the gas balloons will be less? Explain mathematically. 4 ( ) Sylhet Board-2019 Physics: First Paper Time- 25 minutes Creative Multiple Choice Questions Subject Code 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] 1. 2. Which one is derived quantities? 3. a. Density b. Mass c. Temperature d. Time If the weight of an object is 20N in the earth, then what will be the weight of it on the moon? a. 100N b. 39.2N c. 20N d. 4N Velocity of stone in an arrow depends on — i. mass of the arrow ii. extension of the arrow iii. mass of the stone in arrow Which one of the following is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii Diameter of a capillary tube is 0.4 mm. It is dipped into the water where tension of the surface is 72 × 10-3 N/m and density is 103 kgm-3. Give answer to question no. 4 and 5 on the light of the information. 4. Water will reach to how much height in the tube? a. 7.3469 m b. 0.73469 m c. 0.073469 m d. 0.0073469 m Board Exam Questions 13 Into how much height water will reach if the radius becomes double? a. 0.00367 m b. 0.03673 m c. 0.3673 m d. 3.6734 m 6. What is the surface energy when the water surface tension is 0.06 N/m? a. 60 N/m b. 6 N/m c. 0.6 N/m d. 0.06 N/m ^ 7. What is the value of P when P = i ^ ^ – j – k? a. 3 b. 3 c. 1 d. –1 A car is moving from its steady position –2 with 2ms uniform acceleration. According to the stem, answer question nos. 8 and 9 : 8. How much distance travels by 2s? a. 1 m b. 2 m c. 4 m d. 8 m 9. How multiple the distance of 2s will be after 4s? a. 16 b. 8 c. 4 d. 2 10. Banking on the road depends on i. car's velocity ii. turn radius iii. acceleration due to gravity Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 11. How much the angle between force and displacement when the work is done by force? a. 45 b. 120 c. 180 d. 200 12. The equation for escape velocity is a. Ve = 2gR b. Ve = GM/R c. Ve = 2GM/R2 d. Ve = 2gh 13. Which one is the dimension of the co-efficient of viscosity? a. ML–1T–1 b. MLT–1 c. ML–1T d. ML–1T–2 Ans. 5. a b 1 14 d b 2 15 3 16 c b c b 4 17 14. The equation for a particle 21. Value of g displacement for the condition of i. high at the surface of earth ii. zero at the centre of earth the simple harmonic motion is iii. ratio at the surface of the earth i. x = Asin2nt and at the surface of the moon is ii. y = ax – bx2 16:81 iii. x = Asinwt Which one of the following is Which one is correct? correct? a. i and ii b. i and iii a. i and ii b. ii and iii c. ii and iii d. i, ii and iii c. i and iii d. i, ii and iii 15. What is the wavelength of a wave when its velocity is 3.1 ms–1 and 22. A time period 0.20 sec? a. 6.2 m Q P b. 0.62 m c. 0.062 m d. 0.0062 m B C 16. The frequency of a second R pendulum is Which one is correct from figure? a. 0.25 Hz b. 0.5 Hz a. P + Q + R = 0 c. 1 Hz d. 2 Hz b. R = Q + P According to the stem, answer the question nos. 17 and 18 : c. P = R + Q The graph shows displacement vs time of d. Q = P + R wave. 23. The horizontal component at any 0.75 point in the acceleration in the P Q 3 case of projectile motion is 0 a. g b. – g 2 t c. g/2 d. zero 24. Which one is more stronger force 17. What is the velocity of the wave? that given below? a. 5 ms–1 b. 0.5 ms–1 a. Weak nuclei force –1 –1 c. 2 ms d. 0.2 ms b. Strong nuclei force 18. The phase difference between P c. Gravitational force and Q point of the wave is d. Electro magnetic force a. 0 b. /2 25. For object, the change of momentum and kinetic energy c. d. 2 graph is 19. By dew point we understand E E a. Humidity b. Relative humidity a. b. c. Temperature d. Heat 20. What is the outer result of beat? P P a. Diffraction E E b. Reflection c. d. c. Super position d. Resonance P 5 18 b c 6 19 d c 7 20 b c 8 21 c a 9 22 c c 10 23 d b 11 24 P a b 12 25 a 13 a a Creative Essay Type Questions Time 2 Hours 35 Minutes Full marks 50 [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] 1. Observe the following figure : C B P = 4i + 3j R O Q = 2 j + 5k O P A a. What is called torque? 1 b. Why it was needed international system of unit measurement. 2 c. According to given stem, calculate the value of . 3 d. Is the sum of the area of OAB and OBC equal to the area of parallelogram OABC or not? Explain mathematically. 4 2. In a friendly cricket match, the ball falls on the roof of a high building stand nearby while Pretom strikes the ball with a bat. Pretom did not go to collect the ball from the roof declining height more than 96 m due to doctor's prohibit. Plabon got up on the roof and threw the ball with 60 angle with the vertical and 5 ms–1 velocity to the down. Pretom caught the ball at 2m height from the earth after 3 sec to throwing the ball. Panjeree HSC English Version Test Papers Made Easy Physics First Paper 14 a. b. c. d. What is the neat ball? 1 Why the mass is called inertia of mass? Explain it. 2 At what speed did the ball hit on Pretom's hand? 3 Could Pretom really get up on the roof or not? Give your opinion with mathematical analysis. 4 3. A planet of radius 6.4×106m moves once around its own axis in 24 hours. A scientist put a substance of 80 kg at 58 north axis, to establish the relation of 'g' acceleration due to gravity with the planet. g = 9.80 ms–2. a. What is escape velocity? 1 b. Acceleration due to gravity of a place in earth is proportional to the distance from the centre of the earth Explain. 2 c. What will be the linear velocity at that place on the planet for the circulation? 3 d. Would the weight is more or less of that place than to the weight at the surface of the planet? Give your opinion with mathematical analysis. 4 4. A piece of stone of mass 4 kg falls from 5 m above upon an iron rod of the same mass which was entering the ground. Consequently the rod entered 10 cm more deep into the ground. a. What is efficiency? 1 b. The temperature of a gas cannot have below the absolute zero-temperature Explain it. 2 c. What will the average preventive force of the soil? 3 d. Does the incident mentioned in the stem support the work-energy theorem? Explain it mathematically. 4 5. A second pendulum gives the right time on the surface of the earth. It loses 10 sec time in each day if it is taken on the top of the mountain. [The radius of the earth is 6400 km and gravitational acceleration of the earth is g = 9.8 ms–2] a. What is parking orbit? 1 b. Time period of revolution around the sun of the rotating planets is different Explain it. 2 c. What is the height of the mountain mentioned in the stem? 3 d. What mechanical measure should be taken to unchanged the time period of the pendulum on the top of the mountain? Explain mathematically. 4 6. Sheema carrying a bag of 18 kg. After reaching 50m height building the bag falls down from the roof to the roof of a beside building of height 'h' at a velocity 24.25 ms–1. a. What is spring force? 1 b. Why is a simple pendulum placed at 4 angular amplitude? Explain it. 2 c. Determine the value of 'h' of the stem. 3 d. Will potential energy be equal to kinetic energy at height 'h'? Explain mathematically. 4 7. There are 400 chickens in a poultry farm. The present intensity of sound in the poultry farm is 3.2 × 10–4 Wm–2. The owner of the farm increases the number of chicken upto 2400. [Standard intensity of sound is 10–12 Wm–2] a. What is sound? 1 b. Are the frequency and pitch same or not? Explain it. 2 c. Determine what was the intensity level in bel of the poultry farm mentioned in the stem. 3 d. What kind of problem may occur in the farm due to increase the number of chickens in the farm? Give its mathematical explanation. 4 8. In the laboratory Dip hangs 25 kg mass at the end of the wires of 6m length and 0.6 mm diameter. One wire is steel and the other is lead. After hanging the mass he finds the extension of length of both the wires 0.026 m and 0.325 m respectively [Ys = 2 × 1011Nm–2] a. What is binding energy? 1 b. What is the relation between inter molecular force and inter molecular distance? 2 c. Determine elastic potential energy of the steel wire with expanded condition. 3 d. Which wire has the higher ability to carry load? Analyze mathematically. 4 Jashore Board-2019 Physics: First Paper Time- 25 minutes Subject Code Creative Multiple Choice Questions 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] Read the stem below and answer the 2. questions no. 1 and 2 : AB rod rotated on axis XY. Total length is 2m and mass is 2kg of the rod. X X A B Y Fig-A 1. A B Y Fig-B 3. If the moment of inertia of fig-A is I1, and fig-B is I2 then which one is correct? a. I1 : I2 = 1 : 1 b. I1 : I2 = 1 : 2 4. c. I1 : I2 = 4 : 1 d. I1 : I2 = 1 : 4 The value of radius of gyration of fig-B is 1 2 a. b. 3 3 5. 1 3 c. d. 4 12 Which one is correct if the distance between the source and the observer is twice? 6. a. Two times increase b. Four times increase c. Two times decrease d. Four times decrease The stretched wire of length Lm and mass M kg then frequency f is L b. ML M M 1 c. d. L ML A wire is divided into two equal parts. The breaking weight of the wire will be a. half b. equal c. twice d. one-forth A spherical ball of radius R falling with terminal velocity v through a medium of co-efficient of viscosity , acting viscous force F will be 1 a. F R and F v b. F R and F v a. Board Exam Questions 15 1 1 and F R v 1 d. F and F v R In case of projectile i. gravitational force is the only one active force on the projectile ii. in case of projectile motion the value of g is constant iii. trajectory of a projectile is three dimensional Which one is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii A wire of length 1m and diameter 1mm. Length is increased 0.025 cm by a force. What is the decreased diameter? [ = 0.1] a. 1.5 × 105 mm b. 2.5 × 10–5 mm c. 3.5 × 105 mm d. 2.5 mm Pressure of a gas (P) and volume (V), according to Boyles' Law which one is correct? c. F 7. 8. 9. Y Y V a. O P x V b. O Y O x Y P c. P PV x PV d. O x P 10. If the vector field V irrotational then which one is correct? a. .V = 0 b. V = 0 c. .V 0 Ans. d. V 0 11. If a truck of velocity VT towards east and a car of velocity VC towards west. Which is the relative velocity of car with respect to truck? a. (VT + VC) b. (VT – VC) c. (VC – VT) VT d. VC 1 14 c a 2 15 c d 3 16 d c 4 17 d b 12. The mass of two body are 1kg and 4kg moving with same kinetic energy. The ratio of the linear momentum will be a. 4 : 1 b. 2 : 1 c. 1 : 2 d. 1 : 16 13. Characteristics of uniform circular motion i. Have uniform angular velocity ii. Angular acceleration is zero iii. Have no centripetal acceleration Which one is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 14. Which one is an observational error? a. Parallax error b. Black-lash error c. Level error d. Random error 15. A particle moves in a simple harmonic motion, amplitude A and displacement x. Acceleration is minimum when a. x = A position A b. x = position 2 A c. x = position 4 d. x = 0 position 16. A square frame of L arm immersed into a liquid and then lift up. What is the work done when the displacement of one arm is x? [T is the surface tension of this liquid.] a. W = 2LT b. W = T c. W = 2LTx d. W = LTx 17. Which is the relationship between root mean square velocity and absolute temperature? a. Cr.m.s T b. Cr.m.s T 1 1 c. Cr.m.s d. Cr.m.s T T 18. Which one below is not the unit of energy? a. kw-h b. N-m c. kgms–1 d. W-s 19. Which one is the dimension of force constant? a. [ML0T–2] b. [M2LT–1] c. [ML–2] d. [ML2T2] 5 18 a c 6 19 b a 7 20 a c 8 21 b a 9 22 20. A body of mass 5kg is moved from ^ ^ a point of position r1 = (8i + 7j – ^ 3k)m to another point of position r2 ^ ^ ^ = (12i + 2j + 7k)m under a force F ^ ^ ^ = (10i + 3j – 2k)N. The amount of work done is a. 2J b. 3J c. 5J d. 7J ^ 21. If n = c. |A B| a. AB ^ then - n equal to what? BA b. d. |A B| |B A| AB AB |B A| |A B| BA Read the following stem and answer the question no. 22 and 23 : Path difference between two particles of a wave is 22.5cm and phase difference is 3.14 rad. Frequency of the source is 420 Hz. 22. Wave length of the wave is what? a. 0.25 m b. 0.45 m c. 0.75m d. 45m 23. According to the stem i. Wave velocity is 189ms–1 ii. Create audible sound iii. Time period will be 2.38 sec Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 24. If gravitational acceleration g and time period T, which one of the following graphs is correct? Y Y a. T2 b. T2 O g x Y c. T2 O g x Y d. T2 O g x O g x 25. Which is the horizontal distance R, if a body throwing up perpendicularly? V0 a. R = Rmax b. R = 2 V0 c. R = d. R = 0 g b b 10 23 b a 11 24 c b c 13 a d 12 25 Time 2 Hours 35 Minutes Full marks 50 Creative Essay Type Questions [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] 1. In three dimensional coordinate system the coordinate of three points are defined as P (1, 2, –1), Q b. Least count of a spherometer is 0.01 mm Explain. 2 (–2, 1, 1) and R (3, 1, –2). P , Q and R represent the position vector of the three points with respect to the origin of the coordinate system. a. Define bound vector. 1 c. Calculate the magnitude of projection of Q on P . 3 d. The triangle formed by joining points P, Q, R in order is a right angled triangle– Verify the statement mathematically. 4 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 16 2. b. Graphically explain the velocity of a metal sphere falling through a viscous fluid. 2 c. Calculate the time period of the satellite. 3 d. Mathematically explain whether the satellite will act as a geo-stationary satellite or not. 4 6. Y V0 = 30ms1 H 0 = 40 O P M X An object is projected with a velocity V0 at an angle 0 from surface. Its maximum height from surface be PH. a. Define circular motion. 1 b. While a bullet is shot from a gun, which one will have greater kinetic energy Explain. 2 c. Calculate the magnitude of velocity with which the object will drop at point M. 3 d. Mathematically verify the inequality OP > PH. 4 3. The length and mass of two straight, thin rod of negligible area of cross-section is 1m, 0.707m and 10kg, 20kg respectively. Both the rods are rotated about an axis perpendicular to their length and passing through their centre of gravity with uniform angular speed 300 rot/min and 360 rot/min respectively. When the motor is shut down, the first rod stops in 20s. a. What is torque? 1 b. If the earth suddenly stops rotating about its own axis then explain the change in 'g' on earth surface. 2 c. Calculate the number of complete rotations performed by the first rod before it stops. 3 d. Mathematically compare the angular kinetic energy of the two rotating rod. 4 4. FK = 2N m D C B 30 A E A rectangular object of mass m is sliding down over a slanted surface DA. Given m = 50kg, DE = 6m and AB = BC = CD. a. State the work-energy theorem. 1 b. Explain the significance of spring constant. 2 c. Calculate the amount of work done by the kinetic frictional force while sliding down the slanted surface. 3 d. Mathematically verify whether the object obeys principle of conservation of mechanical energy at B and at C. 4 5. An artificial satellite is projected from Kennedy Space Centre and launched at a height 3.58 × 107 m from earth surface along the equatorial line. Mass and radius of earth is 5.972 × 1024kg and 6.4 × 106m respectively [G = 6.67 × 10–11Nm2kg–2] a. Define Gravitational potential. 1 K = 1000 Nm1 m = 1.58 kg 4 cm A spring is placed horizontally with one end attached to a rigid support and the other end to rectangular object placed on a frictionless surface. The spring is stretched out by 4cm and then released. a. Define non-conservative force. 1 b. When the spring of a toy car is winded and placed on a surface, the car moves forward Explain why. 2 c. Calculate the frequency with which the spring will oscillate. 3 d. Explain the velocity vs time graph of the oscillating spring with mathematical analysis. 4 7. Four tuning forks are labelled as A, B, C, D. The density of the material of tuning fork A is 1.3kg/m3 having frequency 250 Hz and produces sound wave of amplitude 0.5m and velocity 345 m/s in air. Fork-A produces 2 and 6 beat with B and D respectively. B produces 4 beat with D. B and D both produces 1 beat with C. a. What is stationary wave? 1 b. Explain the effect of a resonating substance presence on the intensity of sound. 2 c. Calculate the intensity of sound produced by ForkA. 3 d. "Unknown frequency of a tuning fork can be determined by counting beat." Mathematically verify the statement by calculating the frequency of C. 4 8. m1 = 30g C = 575ms1 Temperature = T m2 = 48g R = 8.31Jmole1K1 Temperature = T Figure-A: Nitrogen gas Figure-B: Carbon dioxide gas a. State Boyels' law. 1 b. Explain the graph PV vs P of an ideal gas at constant temperature. 2 c. Calculate the temperature of gas enclosed in the cylinder. 3 d. Mathematically compare the average kinetic energy of the gas enclosed in two container. 4 Board Exam Questions 17 Barishal Board-2019 Physics: First Paper Time- 25 minutes Subject Code Creative Multiple Choice Questions 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] 3. 4. g 6. 7. a. g b. g sin c. g cos d. zero The direction of gravitational intensity is a. towards the center of the earth b. towards the gravitational force c. opposite to the gravitational force d. outwards from the center of the earth What is the another name of Bulk modulus? a. Incompressibility b. Compressibility c. Rigidity modulus d. Young's modulus What is the nature of longitudinal strain versus lateral strain in the following graphs? a. Lateral strain 5. b. c. Lateral strain Longitudinal Strain Longitudinal Strain Lateral strain 2. For a very brief period if a large force acts on a body is called a. cohesive force b. rotational force c. electric force d. impulsive force What kind of energy stored for extension of length of the spring? a. Potential energy b. Kinetic energy c. Chemical energy d. Heat energy What is the dimensional equation of torque? a. [ML2T–3] b. [ML–2T2] c. [ML2T–1] d. [MLT–2] [*N.B: Correct answer is ML2T−2.] The acceleration of rolling body in inclined plane at the fig is Longitudinal Strain d. Lateral strain 1. Longitudinal Strain Comments about elasticity is that i. it changes with temperature ii. it changes with the presence of impurity iii. it depends on the shape of body Which one is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 9. The time period of a simple pendulum of length 0.3m is found 0.8sec. What will be the length of 8. the simple pendulum if time period is 2.3 sec? a. 1.8 m b. 2.4 m c. 2.7 m d. 3.6 m 10. The equation of simple harmonic 2 oscillation of a particle is Y = A sin (vt – x), the maximum displacement of the particle is 1 a. A b. A 2 1 c. d. 2 Answer the questions no. 11 and 12 according to the stem : The displacement of a simple harmonic motion of a particle is x = 4 sin 4t m. 11. Time period of the vibrating particle is a. 0.5 sec b. 1 sec c. 2 sec d. 4 sec 12. Position of the particle at a distance 2m from equilibrium position is i. kinetic energy is maximum ii. potential energy is maximum iii. kinetic energy = potential energy Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 13. What is the mass of a body in moon when the mass of that body in earth is 60 kg? The acceleration due to gravity on moon surface is 1 times than the earth surface. 6 a. 10 kg b. 20 kg c. 60 kg d. 360 kg 14. What is the angular frequency of a complete cycle of time period T at a phase difference 2? 2 a. = 2T b. = T 2 c. = d. = T 2 15. To using beats i. Tuned the rid of harmoniums ii. Determination of unknown frequency of a tuning fork iii. Determination of poisonous gases in mines Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 16. According to the kinetic theory of gases what of the following is irrational? a. Molecules obey the Newton's law b. Molecules move in an average velocity in every direction c. Molecules are minute particle d. Molecules are considered as an elastic spheres 17. Why dews drop out before noon in cloudless day? a. The intensity of daylight increased b. Increased relative humidity c. The air become unsaturated with respect to temperature increased d. Rate of vaporation decreased Read the following stem and answer the questions no. 18 and 19 : Any object of 6 kg masses was raised to 10 meters above the earth's surface and then it was moved 5 meters along the horizonal. 18. How much displacement of that body towards gravity? a. – 10m b. – 5m c. 10 m d. 5 m 19. In that case i. work done by the gravitational force is – 588J ii. work done by the external agent is 588 J iii. work done by the gravitational force is – 3.675 × 10–20 eV Which of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 20. What is observational Error? a. Back-Lash error b. Level error c. Parallax error d. Random error 21. What is the angle between A and B when A and B are Parallel? a. 0 b. 90 c. 180 d. 270 22. The divergence of any vector is a. vector field b. scalar field c. gradient of that vector d. irrotational 23. What is the motion of a projectile? a. One dimensional non uniform acceleration b. One dimensional uniform acceleration c. Two dimensional non uniform acceleration d. Two dimensional uniform acceleration Answer the questions no. 24 and 25 according to the following fig : Vo= 15 Y P –1 O 30 stone Q R X Panjeree HSC English Version Test Papers Made Easy Physics First Paper 18 Ans. 24. In fig, OQ = ? a. 9.94 m b. 9.95 m c. 9.96 m d. 9.97 m 1 14 d d 2 15 iii. the vertical component velocity at the point P is zero Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 25. For the stone of the stem i. 0.765 sec time need to reach at the point P ii. the length of OP and PQ are not equal a d 3 16 * b b c 4 17 5 18 b a 6 19 a a 7 20 d c 8 21 a a 9 22 c b 10 23 b d 11 24 a a 12 25 of c 13 c d Time 2 Hours 35 Minutes Full marks 50 Creative Essay Type Questions [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] 1. Anik was measuring dot and cross multiplication c. Determine the work done by the first pump. 3 d. How much time will be saved according to the taking two vectors A = 2 i + j – k and B = i – 2j – 3k . stem? Analyze it mathematically and give your He observed that if the angle between the two vectors opinion. 4 changes with a fixed amount the magnitude of dot and 5. An artificial satellite is placed at a height of 600km cross product will be equal. a. What is called relative velocity? 1 from the surface of the earth. The radius of the earth is due to gravity on the b. It is difficult to walk on the sand. Explain it. 2 6400km and the acceleration of the earth is 9.8m–2. c. Determine the area of a parallelogram considering surface a. What is called surface tension? 1 A and B vectors are two adjacent sides of the b. Is it found the concept of force from inertia? Discuss it. 2 parallelogram. 3 d. Analyze Anik's observation and give your opinion. 4 c. Determine the magnitude of acceleration due to gravity at the height of the stem. 3 2. d. Can it be possible to convert the satellite of the Y stem to Geo-stationary satellite? Analyze it B v mathematically and give your opinion. 4 v 6. The length of a steel wire is increased 0.1mm A applying 10N force on the wire. Another wire of same length and double radius increases its length same due X O C A body is projected from point 'O' of the figure with to change of force. a. What is dew point? 1 velocity 30 ms–1 and making an angle it reached at b. Will the escape velocity of a body be changed due to point C in 3.062s time through OAC path. The body expansion of a constant mass planet? Explain it. 2 can reach the point C projecting with same velocity c. Determine the work done in case of longitudinal through the path OBC. strain for the first wire of the stem. 3 a. What is rectangular unit vector? 1 d. Analyze mathematically the amount of change of b. The resultant of three vectors acting sequentially force mentioned in the stem. 4 may be zero. Explain it. 2 7. A second pendulum gives correct time on the c. Determine the angle of the stem. 3 d. Explain mathematically the possibility of the body surface of the earth. It is taken at the height of 9 km on of the stem to reach at point C through OBC path the peak of the Everest and loses 5 seconds time per and give your opinion. 4 hour. The radius of the earth is 6400 km. a. What is elastic limit? 1 3. Two bodies of masses 5 kg and 7 kg are moving b. Resonance is one type of forced vibration. Explain –1 –1 opposite to each other with velocities 5ms and 6ms , it. 2 after collision the two bodies are combined together c. Determine the time period of the pendulum at the and start moving in a definite direction. peak of the Everest. 3 a. What is called restoring force? 1 d. By determining the height of the Everest from the b. Is there any change of horizontal velocity at the information of the stem, verify its correctness. 4 time of flying of a projectile? Explain it. 2 8. By vibrating A and B wires the following waves c. Determine the final velocity of two bodies of the are produced : stem. 3 YA = 0.1 sin (200t 10x) m d. The collision of two bodies of the stem is elastic or YB = 0.1 sin (208t 16x) m inelastic? Analyze it mathematically and give your opinion. 4 The waves propagates in the same direction and superimpose each other. 4. The depth of a water filled well is 10m and a. What is negative work? 1 diameter is 2m. A pump can make the well empty in 20 b. Will the mean free path be increased if the density minutes. Another pump of power 1HP is added with the of a gas increases? Explain it. 2 above pump to make the well empty some time is c. Determine the wave velocity of the wave produced saved. by the wire 'A'. 3 a. What is angular momentum? 1 d. Is it possible to produce beat by the vibration of the b. Why does the mercury in a capillary tube go down? two wires in the stem? Analyze mathematically and Explain it. 2 give your opinion. 4 ^ ^ ^ ^ ^ ^ Board Exam Questions 19 All Board-2018 Physics: First Paper Time- 25 minutes Subject Code Creative Essay Type Questions 1 7 4 Full marks: 25 [N.B. Answer all the questions. Each question carries one mark. Block fully, with a ball-point pen, the circle of the letter that stands for the correct/best answer in the "Answer Sheet" for Multiple Choice Questions Examination.] 1. When a spring is compressed, what form of energy does it possess? a. Heat energy b. Kinetic energy c. Potential energy d. Internal energy 2. The acceleration due to gravity on the earth, at a height (h) above the earth and at a depth (h) from the earth are g, gh and gbh respectively. Then a. gbh < gh < g b. gh < gbh < g c. gh > gbh > g d. gh > g > gbh N.B: The value of g is maximum at the surface of the Earth. If the value of h is less than 3955.4175 km, the value of g is greater at more depth than at a higher place. If h = 3955.4175 km, then g's value is equal everywhere. If h>3955.4175 km, then the value of g is greater at a higher place. 3. Which graph (distance s VS time t) below is not possible? S S a. b. t t S S c. d. t 4. t A 40gm O2 27 C P Q 6. The velocity of the waves producing the standing wave is a. 100ms–1 b. 200ms–1 c. 300ms–1 d. 400ms–1 7. If the wavelength of the wave is 3 a. PQ = b. PQ = 2 4 5 c. PQ = d. PQ = 4 8. The Gravitational constant G = ? –12 –2 a. 66.7 10 NmKg b. 6.67 10–11Nm–2Kg–2 c. 0.667 10–10Nm2Kg–2 d. 0.0667 10–9Nm–2Kg2 9. Which quantity is conserved in inelastic collisions? a. Kinetic energy b. Potential energy c. Angular momentum d. Momentum 10. Which one below is an example of oscillatory motion? a. Motion of the hand of a clock b. Motion of the earth around the sun c. Motion of an electric fan d. Motion of a tuning fork 11. 6N 60 R = 8.31JK–1 mole –1, atomic mass of O2 = 32gm According to the diagram the total kinetic energy of the gas in the container A is a. 33.65 10J b. 42.07 10J c. 37.39 102J d. 46.74 102J 5. If the least constant of a spherometer is 0.02 mm, which of the following thickness can be measurea accurately? a. 0.005 mm b. 0.001 mm c. 0.01 mm d. 0.03 mm [N.B. None of them can be accurately measured as none of them are simple multiples of least constant.] Read the stem below and answer questions no. 6 and 7: y = 0.6 sin 0 12x cos 24t is the equation of a standing wave, which is represented by the diagram below. x and y are given in meter units. 6N A body of weight 6N is being pulled by a force of 6N according to the diagram. The apparent weight of the body is a. 0.8N b. 3N c. 9N d. 11.2N 12. The area of cross section and breaking mass of a wire are 1mm2 and 40kg respectively. The breaking stress of the wire is a. 4 10–6Nm–2 b. 3.92 10–4Nm–2 c. 4 107 Nm–2 d. 3.92 108 Nm–2 Read the stem and answer questions no. 13 and 14 : The length of the second hand of a clock is 3cm. 13. The linear velocity of the edge of the second hand is a. 3.14ms–1 b. 3.14 10–1ms–1 c. 3.14 10–2ms–1 d. 3.14 10–3ms–1 14. The second hand's i. time period is 1 minute ii. frequency is 1.6 10–3 Hz iii. angular velocity is 0.1046 rad/sec Which one is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii 15. Which of the following are always constant within elastic limit? Stress i. Strain Lateral strain ii. Longitudinal strain Force iii. Area Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 16. Which graph below, drawn between the height of water (h) in the capillary tube and the radius of the tube (r) in a particular place, is correct? h h a. b. h r 1 r c. h d. r 1 r 17. In the case of gravitational potential i. it is a scalar quantity ii. it is negative at any point in the gravitational field iii.its dimension is L2T–2 Which one is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii B 18. 10m 5N C A 8m According to the diagram the power needed to take a block of weight 5N from A to B in 10 seconds is a. 3W b. 4W c. 5W d. 6W Panjeree HSC English Version Test Papers Made Easy Physics First Paper 20 19. In the case of unsaturated vapour M N M N c. d. i. it can be created in any open or closed space M . N M N ii. it can be converted to saturated 21. Which quantity below has the maximum value at the equilibrium vapour by increasing the position of a simple pendulum? temperature a. Acceleration iii. it obeys Boyle's and Charles's b. Displacement law c. Velocity d. Restoring force Which one is correct? Read the stem below and answer a. i and ii b. ii and iii question no. 22 and 23 : c. i and iii d. i, ii and iii Va 20. The unit vector perpendicular to A the plane formed by the vectors M v = 30ms and N is MN M.N = 40 a. b. B T M N M N Two objects are thrown from the points A and B, according to the diagram. –1 Ans. p 1 14 c c 2 15 * a 3 16 d d 4 17 d d 5 18 * a 6 19 b c 7 20 c a 8 21 c c 9 22 22. The vertical component of velocity of the object, after 1 sec of being thrown from B is a. 9.48 ms–1 b. 16.18ms–1 c. 19.28ms–1 d. 25.98ms–1 23. If the two objects take the same time which hitting the target T then a. va = vb cos b. vb = va sin c. va = vb sin d. vb = va cos 24. The mean free path of a gas is inversely proportional to a. the density of the gas b. the atomic diameter of the gas atom c. the square of the number of atoms per unit volume d. the distance travelled by the atom 25. Forced vibration is not resonance if the waves producing the forced vibration do not have the same a. frequency b. amplitude c. wave velocity d. wavelength d a 10 23 d a 11 24 b a 12 25 d a 13 d Dhaka, Dinajpur, Sylhet, Jashore Board-2018 Creative Essay Type Questions Time 2 Hours 35 Minutes Full marks 50 [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the associated questions. Answer any five questions.] 1. North 8N North a = 1ms–2 m 2N Figure-1 8N East m 36.87 East Figure-2 At the same time, three forces are acting on a body of mass (m=10kg) which is shown in the figure : 1. a. What is called angular velocity? 1 b. Though force and displacement are vector quantities, work is derived from them is a scalar quantity Explain. 2 c. What is the magnitude of net force acting on the body of figure-1? 3 d. Justify the validity of figure-2 with respect to figure-1. 4 2. In a cricket field of average radius 66m, team 'A' is doing fielding and B is doing batting. A batsman hits the ball at an angle of 30 with the horizontal when a bowler bowls a ball with a velocity 100kmh–1 towards the batsman. As a result the ball gains the equal velocity of the ball when struck bowler. A fielder at a position just 20m away from the corresponding batsman starts running towards just after the ball was batted with a velocity 10ms–1. a. What is surface energy? 1 b. How will a passenger of a bus determine the average velocity of the running bus using the kilometer stones by the sides of the road and a hand watch with him? Explain. 2 c. What is the maximum height reached the ball in the stem? 3 d. Give your opinion whether the batsman could be 'caught out' in the event of the stem. 4 3. Apu can ride his bicycle around a circular field of radius 20m safely when he is inclined to the centre of the field with an angle up to the maximum value of 30. He was riding at 20kmh–1. a. What is torque? 1 b. Fictional force is a non conservative force– Explain. 2 c. How many times are needed to move around the field in crossing the circular path of 5 km? 3 d. Apu will be able to cross the path safely at a double speed as mentioned in the stem. Justify. 4 4. There is a baby in a family dwelling in an apartment of top floor of a 10 storied building of height 5 m of each floor. A tennis ball of mass 100g released by the baby through the grill of the balcony hits the ground after few moments. a. What is radius of gyration? 1 b. Explain the causes of creasing elastic fatigue of a body. 2 c. After how many time will the tennis ball as mentioned in the stem hit the ground? 3 d. Determining the total energy of the ball at 7th and 4th floors of the building by using the data in the stem will obey the conservation of energy give your opinion verifying the truth of this statement. 4 Board Exam Questions 21 5. Two tuning forks A and B are taken to produce 5 beats per second. The intensity of sound created by the tuning fork A is 1.01 105 Wm–2 and amplitude is 0.02m. The frequency of the tuning fork B is 161 Hz (density of the medium is 1.25kmg–3 and velocity of sound as 350ms–1) a. What is called resonance? 1 b. Write down the difference between the light wave and sound wave? 2 c. Determine the distance travelled by the sound when the tuning fork 'B' makes 250 complete vibration. 3 d. What change in tuning fork 'A' should be make to produce beats mentioned in the stem give your opinion through mathematical analysis. 4 6. An object of 5kg mass is thrown from the earth's surface by escape velocity to another planet of the space whose mass is 16 times of the earth and the diameter is 8 times of the earth radius (earth's mass 6 1024kg, earth's radius = 6.4 103km). a. Write down the work energy theorem. 1 b. The power of a machine is 50 MW Explain. 2 c. Determine the value of gravitational acceleration on the surface of other plant as mentioned in the stem. 3 d. Will the required escape velocity of the body when its mass is half of the mass as mentioned in the stem is thrown from the another planet be the same as the escape velocity at the earth's surface? Give your opinion through mathematical analysis. 4 7. Each of two masses having 0.05kg is attached at the free ends of each of two wires with the same length of 1m and of same element suspended from firm support. The diameters of the wires are respectively 2mm and 4mm (young's modulus = 2 1011Nm–2. a. What is called viscosity? 1 b. Why is drop of rain spherical? 2 c. Determine the potential energy per unit volume of the first wire. 3 d. Which one will move slowly if each of the suspended wires with the attached mass behaves as simple pendulum? Explain with mathematical analysis. 4 8. The volume of an air bubble becomes double when it comes at the surface of a lake at the location A from its bottom. In the lake the pressure of air is 105Nm–2, the temperature of air is 18.6C and the relative humidity is 52.4%. On the other day, in a lake of another location B, the temperature of air is equal to that of the lake of the location A and the dew point is 7.4C. At temperatue 7C, 8C, 18C and 19C the saturated vapour pressures are respectively 7.5 10–3m, 8.2 10–3m, 15.6 10–3m and 16.5 10–3m mercury. a. What is standard pressure? 1 b. Clothes are dried out in rainy season slower than that in winter. Explain. 2 c. Determine the depth of the lake at the location A. 3 d. At what place as mentioned in the stem will a man feel more comfort? Explain with mathematical analysis. 4 Rajshahi, Cumilla, Chattogram, Barishal Board-2018 Creative Essay Type Questions Time 2 Hours 35 Minutes Full marks 50 [N.B. -The figures in the right margin indicate full marks. Read the stems carefully and answer the related questions. Answer any five questions.] 1. The co-ordinates of three points A, B and C are (2, 1, –1), (3, –2, 4) and (1, –3, 5) respectively. An object moving with uniform velocity took 2 seconds, to move from the point B to the point C. [all the quantities are given in S. I. units] a. What is hypothesis? 1 b. Why is gravity a conservative force? 2 c. Determine the velocity of the object in BC path. 3 d. Will the position vectors formed by the points in the stem be in the same plane? Give logic to support your answer. 4 2. An object of mass 2kg was hung by a thread and was raised 5m upwards with an uniform acceleration of 2.2ms–2 and then it was lowered. T a = 2.2m/s2 m = 2kg a. What is absolute humidity? M = 1.52 1025kg Planet O M = 7.5 1022 kg Satellite Space Shuttle 4.5 108m While lowering While raising b. Can the motion of the projectile be one dimensional though it is two dimensional? Explain. 2 c. What is the tension in the thread while raising upwards? 3 d. To raise the object upward or to lower the object, the work done by the tension in the wire on the object will be more in which case? Give your opinion by mathematical analysis. 4 3. T a = 2.2m/s2 m = 2kg 1 Look at the stem above. a. What is angular acceleration? 1 b. Why is the velocity of a gas molecule zero at absolute temperature? Explain. 2 c. Determine the velocity of the satellite. 3 d. Which going from the planet to the satellite, will the resultant force on the space shuttle be zero at any place? Give your decision mathematically. 4 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 22 4. To seek the attention of players, the referee of a badminton match blew a whistle and produced a sound x wave Y1 = 10sin 200t – . The sound get 3.4 reflected against a wall at a distance of 40m and came back. The players Rita and Mita were standing towards the wall at distances 13.6m and 18.7 m from referee respectively. a. What is temporal periodicity? 1 b. Why does the second clock go slow in the summer? Explain. 2 c. Determine the frequency of the sound produced by the referce. 3 d. After reflection will Rita and Mita, both hear the sound with same loudness? Give your opinion by mathematical analysis in the light of the stem. 4 5. ( P ) X 1.5m 1.5m A B Q Y The mass of the rod in the figure is 3 kg and XY is the axis of rotation. a. What is horse power? 1 b. The intermolecular force is the reason for the elasticity of solid objects Explain. 2 c. If the rod is rotated about the axis XY, what will the radius of gyration be? 3 d. XY or PQ about which axis will it be comparatively easier in rotate the rod? Explain mathematically. 4 6. Place dry bulb thermometer wet bulb thermometer reading reading Comilla 20C 12 C Place Khulna temperature of air 20C dew poird 8.5C temperature saturated water vapour pressure 5.68C 6.856 10–3 mHgP 8C 8.04 10–3 mHgP 9C 8.61 10–3 mHgP 20C 17.6 10–3 mHgP a. What is moment of inertia? 1 b. The earth moves round the sun but why is no work being done? Explain. 2 c. What is the dew point at Comilla? (G at 20C = 1.79). 3 d. In the light of the stem which place will be more humid? Give your opinion by mathematical analysis. 4 8.2ms–1 7. P = 60 x –v = ? In the figure, a ball is thrown horizontally from the top of a building. While looking at the direction of motion of the ball, Karim assumed that if the value of becomes 62 after 2 seconds, the vertical distance traversed by the ball will be equal to the horizontal distance of the ball from the building. a. What is beat? 1 ^ ^ b. Explain why k.j = 0. 2 c. Determine the velocity of the ball at P 3 d. Was Karim's assumption correct? Verify with mathematical logic. 4 8. To determine the viscous drag of water and purity of water, Tajin performed an experiment in the laboratory according to the figure. Capillary glass tube 0.06 mm 40 cm Iron sphere 0.5 Terminal velocity mm Water = 1000 kgm–3 2 cms–1 a. What is co-efficient of viscosity? 1 b. Why does not the Poisson's Ratio depend on the stress applied, within the clastfic limit? 2 c. Determine the viscous drag of water on the iron sphere. The co-efficient of velocity of water is 3 10–3 Nsm–2. 3 d. In the water used in the laboratory pure? Give your decision by analysing the result from the experiment. [The surface tension of pure water is 72 10–3 Nm–1.] 4 Dhaka Board-2017 Physics: First Paper Time-25 minutes Creative Multiple Choice Questions Subject Code 1 7 4 Full marks-25 [N.B. Choose the best answer among the options. Fill the circle in the answer sheet with ball point pen. Each question has value 1.] 1. Who made the plane model after 2. If P . Q = PQ iii. The angle between P and Q is 0 observing a bird flying? Which of the following is correct? a. Robert Hooke i. P & Q is parallel a. i & ii b. Roger Beckon b. i & iii c. Leonardo Da Vinci ii. P & Q is of opposite direction c. ii & iii d. i, ii & iii d. Isaac Newton Board Exam Questions 3. 23 In XZ plane what is the unit value ^ ^ ^ of this vector 3 i + 5 j + 4k ? a. 5 b. 34 c. 41 d. 12 4. Which of the following is correct? a. L + N M = 0 b. L + M + N = 0 c. L + M N = 0 d. M + N L = 0 Answer questions no 5 & 6 using the data in the stem: v(ms1) Ans. 5. What is the acceleration of CD line? a. 2.0ms2 b. 0.5ms2 c. 0.5ms2 d. 2.0ms2 6. What would be the distance in last 10 seconds? a. 75m b. 150m c. 200m d. 350m Answer questions no 7 and 8 using the data in the stem: An object falls down from 20m high. (g = 10ms2) 7. At which velocity it will be in the ground? a. 10ms1 b. 20ms1 c. 200ms1 d. 400ms1 8. What is the ratio of potential energy to kinetic energy above 5m height from the ground while moving freely? a. 1 : 2 b. 1 : 3 c. 1 : 4 d. 2 : 1 9. If the momentum of an object is increased by 50%, what would be the increase in kinetic energy? a. 25% b. 50% c. 125% d. 225% 10. What is the angle between friction and velocity of an object? a. b. 2 c. d. 0 4 11. What is the unit of spring constant? a. Nm2 b. Nm c. Nm1 d. Nm2 1 c 2 a 3 a 4 d 14 d 15 c 16 b 17 b 12. What will happen if a pendulum watch is taken to the apex of a hill? i. Time period will increase ii. It will run slowly iii. It will lose some time Which one of the following is correct? a. i & ii b. i & iii c. ii & iii d. i, ii & iii 13. If the radius of a circular object is divided into two, how many times would be the moment of inertia with respect to central axis? a. one –fourth b. half c. two times d. four times 14. If the differential equation of simple d2x harmonic motion is 4 2 + 64x = 0, dt what is the angular velocity? a. 64 rad/s b. 16 rad/s c. 8 rad/s d. 4 rad/s 15. What is the difference in phase of two antinodes? a. b. 4 2 c. d. 2 Y Q U P t(s) R S 16. Which of the two points in the stem are at same phase? a. P & Q b. P & U c. Q & S d. P & R m k1 k2 17. If the object having mass m is pulled and leave what would be the frequency of oscillation? 1 k1 k2 a. = m 2 1 m b. = k1 + k2 2 1 k1 + k2 c. = m 2 1 m d. = 2 k1 k2 18. Which of the following graph represents the gravitational acceleration towards the centre of the earth? [g = gravitational acceleration, h = height towards the centre of the earth] a. g O b. g O g h d. O h h c. g O h 19. Which of the graph represents Boil's formula? a. PV b. O P O V PV c. d. V P O V O V 20. If the temperature of the dry and wet bulb of a hygrometer suddenly decreases, what kind of change in weather is an indication? a. Strom b. Fog c. Sunny day d. Dew 21. The fundamental principle of Kinetic Theory of Gas is — i. The velocity of molecules increases with increase in temperature. ii. The volume of the molecules is negligible compared to molecular distance. iii. The molecules cannot move in equal velocity during the collision Which one of the following is correct? a. i & ii b. i & iii c. ii & iii d. i, ii & iii 22. What is the orbit of paking? a. the roadway plane moves b. the orbit of polar satellite c. the orbit of the fixed satellite d. the orbit of the earth 23. Which of the following figure is applicable for falling object in water? (velocity = v, height = h) v Velocity b. v a. o o h v ˆVelocity depth h d.velocity c. o Height o Height 24. At which depth the gravitational acceleration would be one-third of the gravitational acceleration of earth? (R = radius of earth) R R a. b. 4 3 R 2R c. d. 2 3 25. What is the opposite to modulus of volume? a. Modulus of solids b. Young’s modulus c. Poison’s ratio d. Compressibility 5 d 6 a 7 b 8 b 9 c 10 a 11 c 12 d 18 c 19 a 20 a 21 a 22 c 23 a 24 d 25 d 13 a Panjeree HSC English Version Test Papers Made Easy Physics First Paper 24 Creative Essay Type Questions Time- 2 hours 35 minutes Full marks: 50 [N.B. The numbers on the right side shows the marks distribution. Read the stems attentively and answer five questions out of eight.] In the figure, OABC is a rectangle. OA and OB represent the vector ^ ^ ^ ^ ^ ^ P = i 2 j k & Q = 2 i 3 j + 2k. a. What is Instantaneous Velocity? 1 b. Write down two differences between Forced Vibration and Resonance. 2 c. What is the area of OAB of the stem? 3 d. Which one is greater between 1 and 2? Explain mathematically using the stem. 4 2. Sumon and Rana, two friends see that, an object was 1 thrown from O point at 32ms velocity having an angle 30 covers 2m high wall AB covering horizontal distance 85m and falls down. a. What is Gravitational Potential? 1 b. What kind of force can ensure constant velocity? Explain elaborately. 2 c. Calculate the velocity of the thrown object after 1.2 seconds from point O. 3 d. At what smallest angle change the Projectile will face obstacles in the wall AB? Give your opinion and justify mathematically. 4 3. In a high rise Building-a lift having a capacity of st th 400kg take people from 1 floor to 6 floor. The height of each floor is 3m. The mass of a person in that office is 45kg. One day he measures his weight in a machine inside the lift when the lift was moving at an acceleration of 2ms2. The acceleration due to gravity was 9.8ms2. a. What is viscosity? 1 b. What is the difference between elastic friction and inelastic friction? 2 c. In order to take the lift from 1st floor to 6th floor at 2ms1 velocity what would be the least capacity of the motor? 3 d. Was the weight of that person accurately calculated on that condition-mathematically gives an opinion. 4 4. Inside of the earth Outside of the earth Distance Centre of the earth The above figure shows the change in gravitational acceleration from the centre of the earth. The mass of earth is M = 6.0 1024kg and radius of earth is R = 6400km. a. What is gradient? 1 b. Is the velocity at pick point of the projectile is zero? 2 c. What is the gravitational intensity at point A? 3 d. If a second pendulum is taken from point A to point B what would be the change in motion? Explain mathematically. 4 5. According to the figure the initial length of a wire A is 1m and cross-sectional area 1mm2. On the other hand, Young's modulus of a wire B having 2m length is 1.2 1011Nm2. One of the wire is comparatively thick and the other is more elastic. The increase in length due to applied force is shown in the graph. An object is bind by one wire and pulled by another wire. Increase of length 1. force a. What is beat? 1 b. Can the value of summation and subtraction of similar vector be same? Explain. 2 c. What is the Young’s Modulus of wire A? 3 d. Which wire is suitable for which work? Explain it mathematically. 4 6.A simple pendulum is taken to a hill. It completes 11990 full oscillations in 10 hours. But in-plane field, it completes an oscillation in 3 seconds. The average radius of earth is 6400km and the height of Mount Everest is 8.854 km. [The gravitational acceleration is 9.8ms2.] a. What is stress? 1 b. Explain the reason behind the water rise in Capillary tube made of glass. 2 c. What is the effective length of a simple pendulum? 3 d. Compare the height of the hill with respect to Mount Everest mathematically. 4 7. In the air, a tuning fork C creates 5 beat with tuning fork A and B. The frequency of A is 385 Hz. The equation of wave of tuning fork B in air is — 30t x y = 0.9 sin 10 0.4 4.8 a. What is angular momentum? 1 b. The curvature of the road has which angle at which position- explain with valid reasons. 2 c. Measure the wavelength of B. 3 d. How to confirm the frequency of C- give a mathematical explanation. 4 ( ) Board Exam Questions 25 8. In a laboratory the value of a wet and dry bulb Hygrometer is 30C and 28C. The value of atmospheric pressure and coefficient of Glaiser is given in Chart -1: Chart -1 Temperature Saturated Vapor Glaser’s pressure (mHg) coefficient 1.69 26C 25.21 103 1.67 28C 28.35 103 1.66 29C 29.93 103 1.65 30C 31.83 103 a. Define conservative force. 1 b. What is the difference between Elastic limit and Elastic fatigue? 2 c. What was the relative humidity at the laboratory on that day? 3 d. If the temperature falls 1C, what would be the change in dew point? 4 Rajshahi Board-2017 Physics: First Paper Time-25 minutes Creative Multiple Choice Questions Subject Code 1 7 4 Full marks-25 Position [N.B. Choose the best answer among the options. Fill the circle in the answer sheet with ball point pen. Each question has value 1.] The figure represents the 1. Any liquid deters at different 7. Rotating force displacement Vs time graph. The stages of its relative motion.This a. Only changes in numerical incident is called — value of force figure a. Elasticity b. Only changes in direction of i. The velocity in OP is zero and b. Inelasticity forces the displacement increases. c. Viscosity c. Changes in both value and ii. The velocity in PQ is zero and direction d. Compressibility displacement is constant . d. No change in value and iii. The velocity in QR is constant 2. Dew point is direction and displacement decreases. a. Heat 8. Which of the following graph Which one of the following is b. Temperature rd represents the 3 law of simple correct? c. Humidity pendulum? a. i & ii b. i & iii d. Relative Humidity 2 T c. ii & iii d. i, ii & iii L2 3. If the bob of a simple pendulum is 13. Which equation represents the filled with water after making a a. b. value of radius of curvature ? hole in the bob liquid was d2 h g dropping in drops. The pendulum g a. R = + c. T2 d. T2 6 2 will d2 h i. 1st it will be slow and then it b. R = + L 2 6 will be fast. g ii. 1st will be fast then will be slow 9. | A B | = which of the following d2 h d2 h c. R = + d. R = + is correct? iii. the resultant centre of mass will 6h 2 12 2 be below the centre 14. Impulse of force is a. A2B2 ( A . B )2 respectively. i. Multiplication of force and time Which one of the following is 2 2 implied b. A B 2 A . B correct? ii. Change in Momentum c. A2B2 + 2AB sin a. i & ii b. i & iii iii. Rate of change of momentum. d. A2B2 + 2AB cos c. ii & iii d. i, ii & iii Which one of the following is 10. The equation of velocity of a 2 4. The amplitude of an object in correct? moving object is, v = (10 + 4t ). simple harmonic oscillation is a. i & ii b. ii & iii What will be acceleration after 3 0.01 m and frequency is 12 Hz. c. i & iii d. i, ii & iii seconds? 2 1 What is the velocity in 15. Pressure is compound quantity. a. 34ms b. 34ms displacement 0.005m? c. 24ms1 d. 24ms2 The S.I unit of pressure is a. 0.03 ms1 b. 0.3968 ms1 displacement i. Pascal 1 1 c. 0.5328ms d. 0.65264 ms ii. N/m2 Read the following stem and answer P iii. dyne/cm 2 question no 5 & 6. Which one is correct? An object of 0.01kg mass swings in a O a. i & ii b. ii I iii A C B D straight line and has a swing motion.The time c. i & iii d. i, ii & iii time period is 2sec, the amplitude is 0.1m 11. The ration of phase change in 16. The position of P and Q are (3, and displacement is 0.02m. point A and C with respect to 2, 1) and (3, 4, 5), PQ is equal 5. What is the value of force constant? point P is toa. 0.0314 Nm1 a. 1.5 : 2 b. 1.5 : 2.5 1 a. 20 b. 29 b. 0.09854Nm c. 2 : 1 d. 3 : 2 c. 56 d. 6 3 c. 0.02465 Nm1 12. 17. What is the time needed to fall d. 0.3944 Nm1 P Q down from 100m to the surface of 6. What is the ratio of kinetic energy earth for a object having mass to potential energy in the given 4kg? displacement in the stem? R a. 3.2 sec b. 4.5 sec a. 0.42 times b. 2.4 times O . c. 10.2 sec d. 20.4 sec c. 4.2 times d. 24 times Time(t) Panjeree HSC English Version Test Papers Made Easy Physics First Paper 26 Ans. 18. The equation of time of a projectile is V0 sin0 a. T = g 2V0 sin0 b. T = g V02sin0 c. T = 2g V02sin 20 d. T = g 19. An object starts from static condition and covers 2m in 1st second.How much time is needed to cover another 2m distance? a. 0.41 sec b. 1.0 sec c. 1.41 sec d. 2.0 sec 1 14 c a 2 15 b a 3 16 c a 4 17 d b 20. The unit of impulse force is a. kgms2 b. kgm1s1 c. kgm2s d. kgms1 21. A cricket ball of mass 0.25kg was coming at velocity of 40ms1. A player stops the ball in 0.2 seconds. What is the average force applied by the player? a. 20N b. 10N c. 20N d. 50N 22. 1 KW-h is equal a. 1000J b. 3600J c. 6000J d. 3.6105J [N.B.: Correct answer is 3.6 106J.] 23. If two objects of 1kg mass and distance between the two force is 1m, what is the value of attraction force? a. 1N b. 6.67 107Nm2kg2 c. 6.67 1011Nm2kg2 d. 6.67 1011N 24. The strain in length of a wire is 0.02, and lateral strain is 0.002, calculate the Poisson’s ratio. a. 0.00004 b. 0.0004 c. 0.1 d. 10 25. The dimension of co-efficient of viscosity is a. [ML2T1] b. [ML1T1] c. [ML1T2] d. [MLT1] 5 18 a * b b 6 19 d a 7 20 c d 8 21 b d 9 22 10 23 d c Creative Essay Type Questions Time- 2 hours 35 minutes 11 24 c c 12 25 d b 13 c Full marks: 50 [N.B. The numbers on the right side shows the marks distribution. Read the stems attentively and answer five questions out of eight.] 1. On a rainy day, Nafisa observed that rain was falling with a vertical velocity of 6 kmh1 .She also saw that a person was walking with 4 kmh1 and another person was riding a cycle with 8kmh1. They hold their umbrella inclinedly but the angle is different. a. Define Unit Vector. 1 b. Which quantity doesn’t need any unit? 2 c. What is the resultant velocity of rain with respect to the walking person? 3 d. The angle of umbrella between the walking person and the person in the cycle is not the same – discuss the observation of Nafisa mathematically. 4 2. The following graph represents velocity vs. time v (ms1) A 3 B 2 1 O 1 2 3 4 t (sec) a. What is tangential acceleration? 1 b. The acceleration due to gravity is different from different height-explain. 2 c. Calculate the acceleration of OA distance in the stem. 3 d. From the given stem mathematically show that the distance of the object from OA and AB is not same. 4 3.A person having a mass of 80 kg carrying a load of 20 kg climbed on a ladder of 40 m. The ladder was inclined with angle of 40 with the roof of the building. a. What is forced vibration? 1 b. If a sphere is partially poured, it will move slowly? Explain. 2 c. Calculate the work done by the person. 3 d. If the length of the ladder is 60m what should be the horizontal angle to do the same amount of work? In this case is there any benefit? Justify your answer with mathematical expressions. 4 4. A group of students in a physics laboratory hang an object of 500gm mass in a wire and swing it. They observed that it was oscillating at rate 5 per second. The displacement of the object is 5cm and amplitude is 10 cm. a. What is standard intensity? 1 b. The intensity of hearing of human is 1012 – Explain. 2 c. What would be the velocity of the object during the displacement in the stem? 3 d. The force during the displacement of the object in the stem would be 10 times to its weight- give your opinion with mathematical expressions. 4 5. y = 0.5 sin 2(50t 0.75x) is a equation of progressive wave. a. What is beat? 1 b. Resonance is a kind of forced vibration-explain. 2 c. What is the displacement of the wave in 6 seconds? 3 d. If this type of two waves come from opposite direction and fall upon each other, what would be the new type of wave? Give your opinion with a mathematical expression. 4 6.The radius of curvature of a road is 50m and the height difference between two sides is 0.5 m, the width of the road is 5m. a. What is a centripetal force? 1 b. 'Moment of inertia is 50 kgm2' – what do you understand? 2 c. What is the actual banking angle of the road? 3 d. Is it possible to drive a car in 108km/h speed in the road of the stem? Justify your answer mathematically. 4 7.Eti hang a wire of 100cm long and 4 mm2 crosssectional area.She calculated the change in length and width and informed her friend Bithi that the change in Board Exam Questions 27 length and width is 5% and 6% respectively. Hearing this Bithi said that it is not possible. There must be anything wrong. (Young’s modulus, Y = 2 1011N/m2.) a. What is dew point? 1 b. What do you understand by the spring constant of a spring is 5 N/m? 2 c. What mass should be added to the wire to increase its length by 10mm? 3 d. Justify Bithi’s statement mathematically. 4 8.The head of the department of Physics enters into office and sees that the value of hygrometer’s dry bulb is 30C and relative humidity of that day is 75%. He switches on the AC and makes the temperature 23C. The humidity bulb shows 14.76C.[ The chart of Glacier shows for 30C and 23C temperature ,the coefficient of Glacier is G = 1.65 and G = 1.74 respectively.From Reno’s Chart the value of saturated vapour pressure for the temperature 30C, 23C, 8C and 9C is 29.92 mm, 20.24mm, 8.29mm and 9.22mm mercury pressure respectively. a. What is independent dimension? 1 b. The average kinetic energy of one mole of different gases at different temperature is same –explain. 2 c. If the temperature in the air falls to 23C, at what amount of vapour will be condensed? 3 d. The teacher feels comfortable switching on the AC-why? Discuss mathematically using the data in the stem. 4 Dinajpur Board-2017 Physics: First Paper Time-25 minutes Subject Code Creative Multiple Choice Questions 1 7 4 Full marks-25 [N.B. Choose the best answer among the options. Fill the circle in the answer sheet with ball point pen. Each question has value 1.] 5. If f is unsaturated vapor pressure 11. The rate of change of angular 1. If F = (2 i + 2j + k)N force is and F is saturated vapor momentum — applied to a particle and the pressure, which one is correct? a. equal to force b. equal to angular acceleration a. f F b. f F displacement is r = (6 i 3j k)m c. equal to torque c. f F d. f F what would be the work done d. equal to moment of inertia 6. What is the constant value for all a. 20 J b. 4 J Read the stem below and answer gases in a specific temperature? question no 12 & 13: c. (8 i j k) J a. Mass b. Momentum Tuning fork A and B creates 5 beats per c. Volume d. Kinetic energy d. (4 i + 5 j + 3k) J 7. A particle starts with acceleration second. The frequency of B is 430Hz. 2. The angular velocity of Eiffel horizontally straight. The ratio of 12. If the weight of A decreases, the Tower due to the motion of earth beat will decrease. The frequency displacement in 4th and 3rd second is — of A — is — a. 1.99 107 rad s1 a. 420 Hz 4 26 5 1 a. b. b. 425 Hz b. 7.26 10 deg s 3 9 3 1 c. 435 Hz d. 440 Hz c. 4.167 10 deg s 7 c. d. 2 13. If the beat number remains the d. 4.167 103 rad s1 5 same and mass decreases, the Read the stem carefully and answer 8. Which figure is correct for simple frequency of A is — question no 3 & 4. pendulum of L Vs T2 graph? a. 440 Hz b. 435 Hz 2 The equation of a simple harmonic motion is 2 T T c. 430 Hz d. 425 Hz a. b. t 14. If the liquid doesn’t absorb glass y = 10 sin + . The time period T 4 fully what will be the angle between the glass and liquid is — L L is 5 sec. 2 T2 T a. acute angle c. d. 3. What will be the displacement b. obtuse angle after 1.25 sec? c. zero a. 6 unit L L d. rightangle b. 10 unit 9. At the same time the angular Answer questions 15 and 16 using the displacement and linear c. 12 unit d. 18 unit data in the stem: displacement of an object is — 4. The particle a. only scaler change B 30 i. The initial phase is b. constant A 4 20 c. only direction will change ii. Frequency is 0.1Hz d. both scalar and vector change 10 iii. Amplitude is 7 unit 10. Angular momentum Which one of the following is a. The multiplication of radius 1 2 3 4 5 6 7 correct? vector and linear momentum t(s) a. i & ii b. ii I iii b Multiplication of moment of 15. The acceleration of AB is inertia and linear velocity 2 c. i & iii d. i, ii I iii a. 2 ms b. 5 ms2 c. Vector multiply of linear 2 [N.B: The equation should be y = c. 8 ms d. 10 ms2 momentum and angular 2t 16. Displacement after 5 sec momentum 10 sin + ; then the answer a. 50 m b. 100 m T 4 d. Vector multiplication of linear c. 125 m d. 150 m of 3 is 7.07 and 4 is only (i).] velocity and radius v (ms1) ( ) ( ) Panjeree HSC English Version Test Papers Made Easy Physics First Paper 28 17. Poise is unit of — a. Young’s modulus b. Surface tension c. Co-efficient of viscosity d. Compressibility 18. Which one is the graph of velocity Vs time of falling object in liquid? a. v v b. t c. 20. Which one is fundamental unit? i. Electric current ii. Amount of object iii. Luminus intensity Which one is correct? a. i & ii b. ii & iii c. i & iii d. i, ii & iii 21. The angel between Y-axis and vector r = 4 i 4k — t d. v v Ans. t t 19. The radius of a circle R = (10 0.1) cm the volume errora. 1% b. 2% c. 3% d. 4% 1 b 2 b 3 * 4 * 14 b 15 a 16 c Time- 2 hours 35 minutes 17 c a. 0 b. 45 c. 90 d. 180 1 1 1 1 22. If | A + B | = | A B |, angel 1 1 between A & B is — a. 0 b. 60 c. 90 d. 180 23. What is the value of g in equator region? a. increase b. decrease c. remains same d. zero 24. For an ideal object Young’s modulus is — a. 0 b. c. 1 d. 1 25. The work done by force i. Dot multiplication of force and displacement ii. Mass acceleration iii. Equal to change in kinetic energy Which one is correct? a. i & ii b. i & iii c. ii & iii d. i, ii & iii 5 c 6 a 7 c 8 b 9 c 10 a 11 c 12 b 18 a 19 c 20 d 21 c 22 c 23 a 24 b 25 b Creative Essay Type Questions 13 b Full marks: 50 [N.B. The numbers on the right side shows the marks distribution. Read the stems attentively and answer five questions out of eight.] 1. A footballer kicks a football from 25m distance from goalpost with an angle of 20 and velocity of 20 ms1 .The height of the goal post is 2m. a. What is projectile? 1 b. The work done by the gravitational force on a falling object is always positive- explain. 2 c. What will be the velocity after 1 second? 3 d. What is the possibility of goal from that kick? Explain mathematically. 4 2.Noyon is moving a 25g stone with a 1m long wire in a circular shape. The stone is moving 5 times per second. The length of wire is increased by two times and the number of rotations remains the same. The wire can tolerate 40N force. a. What is angular velocity? 1 b. At absolute zero temperature the molecules of gas remain steady-explain. 2 c. What is the angular momentum of the stone in 1st case? 3 d. When the length of the wire is doubled, can Noyon complete the rotation? Justify mathematically. 4 3.The length of a 25 kg cube is 50cm. 5 cube is kept horizontally one by one. Another five cube is also kept horizontally in column shape. a. What is Horse Power (H.P)? 1 b. Friction is a non-conservative force- explain. 2 c. If a stone falls down from the top of the column, at which velocity it will drop down to the earth? 3 d. Which process is more effective of making column? Justify with mathematical expressions. 4 4.The radius and mass of a cosmological object is 3.2106m and 41024kg respectively. Gravitational constant, G = 6.6751011 Nm2kg2. The object was divided into 8 parts due to the hit from a comet. a. What is the longitudinal error in measurement? 1 b. Position vector is a confined vector- explain. 2 c. Calculate the gravitational acceleration of the cosmological object. 3 d. Verify if the escape velocity of each part is one –eighth of the total escape velocity of the cosmological object. 4 5.Ten water droplets of same shapes formed big droplets. The diameter of each small droplets is 5107m. The surface tension of water is 72103Nm1. a. What is viscosity? 1 b. The velocity of the raindrops doesn’t increase with time –explain. 2 c. Calculate the diameter of the big droplets given in the stem. 3 d. Is there any change in the temperature of water in the stem? Explain with mathematical expression. 4 6. The effective length of a second pendulum is 1m in place A and 0.9m in place B. The radius of the bob is 0.75cm. a. Define force constant. 1 b. Pendulum watch runs slow in summer-explain why. 2 c. Calculate the angular velocity of bob in A. 3 d. If any object is taken from A to B place, what will be the change in weight? Justify your opinion with mathematical expressions. 4 7. Two tuning fork A and B create a sound of wave length 50 cm and 51 cm in a gas. If both the tuning forks are tuned at the same time 6 beats are heard per second. The frequency of A is 500Hz. Board Exam Questions 29 a. What is resonance? 1 b. Every harmonic is overtone but every overtone is not harmonic-explain why. 2 c. What is the velocity of sound in the gas? 3 d. There is no change in beat number if the tuning fork is rubbed- explain why. 4 8.The volume of a gas cylinder is 1.5 m3. There is 30 1025 molecules in the cylinder at 27C temperature. Later on, the cylinder was attached to another bare cylinder of the same volume. a. What is ideal gas? 1 b. The kinetic theory of gas supports Boil’s lawExplain. 2 c. Calculate the kinetic energy of the gas in the cylinder. 3 d. Is there any change in the motion of the molecules after connecting the bare cylinder? Justify your answer mathematically. 4 Cumilla Board-2017 Physics: First Paper Time-25 minutes 1. 2. 3. 4. 5. 6. Subject Code Creative Multiple Choice Questions 1 7 4 Full marks-25 [N.B. Choose the best answer among the options. Fill the circle on the answer sheet with ballpoint pen. Each question has value 1.] Answer questions 15 and 16: If the length of minute hand 7. Which one is right for ideal gas? 15. How much time was the hammer decreases — PV PV in contact with the pin? a. Linear velocity increases, a. b. a. 4 103 sec b. 2 103sec angular velocity increases. b. Linear velocity decreases, c. 1 103sec d. 0.25 103sec T angular velocity decreases. 16. The work done by hammar is — T PV PV a. 100J b. 50J c. Linear velocity is static, angular c. d. c. 10J d. 0.2J velocity increases. 17. d. Linear velocity decreases, v T angular velocity is static. T L 8. Which of the following has no For equation T = 2 , which t g specific direction? The figure shows the v t of the following is correct? a. Null Vector b. Equal Vector relation. This graph represents T2 T2 c. Negative Vector i. v = v0 + at ii. a < 0 d. Reciprocal Vector iii. F > 0 a. b. 9. Which one is scalar quantity? Which one is correct? g g a. Inertia of force a. i & ii b. ii & iii 2 2 T b. Angular momentum T c. ii d. iii c. d. c. Centripetal force [N.B: Correct answer is i & iii.] d. Moment of inertia 18. The vector multiply of radius 1 1 vector and applied force is g g 10. If A = 2 B Vector A and B are a. Moment of inertia An object of 2g mass is rotating b. Torque i. Like ii. Unlike with a wire of 10 cm. What is the c. Angular momentum iii. Co-linear moment of inertia? d. Radius of Gyration 2 Which of the following is correct? a. 0.00002kgm “0.3m is the length of a pendulum which 2 a. i & ii b. ii & iii b. 0.02kgm swings in half circle. The mass of the c. i & iii d. i, ii & iii c. 0.2kgm2 bob is 0.01 kg.” d. 100kgm2 11. Keplar’s formula Answer questions no 19 and 20: 3 3 2 What is the unit of Standard a. T r b. T r 19. What is the kinetic energy in 3 2 3 Intensity? c. T r d. T r minimum length? 1 2 a. wm b. wm 12. The dimention of G is — a. 2.425J b. 0.0294J 3 2 2 2 2 1 c. 0.0194J d. 0J c. Bel d. dB a. L T M b. L T M 3 2 2 3 2 1 20. Which equation represents the If the equation of displacement is c. L T M d. L T M path of bob if it is griever from its Y = A sin t, what is the 13. Which of the following unit is 1st position? different from the other three? acceleration Vs time graph? a. y = mx b. y = c + mx a. Density volume velocity a a c. y = bx cx d. y = cx2 b. Rate of change of momentum t 21. How much less is gravitational t b. a. c. Young’s modulus of elasticity area acceleration in places near the d. Mass acceleration due to gravity equator to the frozen area? a 14. The dimension of momentum of a a. 2R b. R c. gyration is — t d. t c. R cos d. 2 R cos 2 2 2 a. ML T b. MLT 22. The escape velocity depends For CO2 gas what is the value of c. ML2T1 d M0L2T2 on ‘A hammer of 1kg weight hit pin at a ? i. radius of a planet a. 1.66 b. 1.41 velocity of 10ms1 . The displacement of ii. acceleration due to gravity the pin is 2cm.’ c. 1.33 d. 1.2 iii. mass of the object Panjeree HSC English Version Test Papers Made Easy Physics First Paper 30 The longitudinal strain is 0.01 and lateral strain is 0.0024. Answer questions no 24 and 25: 24. Poisson’s ratio a. 0.2 b. 0.24 c. 2 d. 2.4 25. Which one represents the Longitudinal strain of the lateral strain? Ans. Which one is correct? a. i b. i & ii c. ii & iii d. i, ii & iii 1 23. In equation PV = mNC2, C 3 a. average velocity b. average square velocity c. actual average square velocity d. velocity of light a. b. c. d. 1 d 2 b 3 a 4 b 5 b 6 c 7 d 8 a 9 d 10 b 11 d 12 d 14 c 15 a 16 b 17 * 18 b 19 b 20 d 21 d 22 b 23 b 24 b 25 a Creative Essay Type Questions Time- 2 hours 35 minutes 13 a Full marks: 50 [N.B. The numbers on right side show the marks distribution.Read the stems attentively and answer five questions out of eight.] 1. In three dimensional Cartesian Coordinate system position of two points are A(1, 0, 1) and B(1, 1, 0) respectively. a. What is right-hand screw rule? 1 b. A Reciprocal Vector can be said as Co-linear vector –explain. 2 c. Determine the unit vector parallel to AB Vector. 3 d. Compare two points A and B's position vector with X axis’s perpendicular projection. 4 2. Two footballers kick a football with velocity 10ms1 and angle 30 and 60 respectively during a practice. A goalkeeper stands up just before the ball was drawn to earth. a. What is Centripetal acceleration? 1 b. The linear velocity is perpendicular to angular velocity in a moving particle –explain. 2 c. What will be the velocity of the ball after 1 second for player one? 3 d. The goalkeeper is able to take both the football at the same time – justify your answer mathematically. 4 3. The diameter of two electric fans is 142 cm and st 122cm respectively. The 1 one rotates at 150/minutes and 2nd one rotates at 180/minutes.Both the fans stop after 2second of switched off. a. Define Torque. 1 b. In case of rotational motion, the moment of inertia of an object is equal to the mass of the object-explain. 2 c. Calculate the centripetal acceleration of the 1st fan. 3 d. After switching off, both fans rotate in the same number – justify the answer. 4 2m A 4. B 2m D O 2m 2m C A square ABCD of 2m edge has centre O. A object of 1kg mass is put into the centre and in points A, B, C and D four objects of mass 4kg, 4kg, 2kg & 2kg are placed. [G = 6.673 1011 Nm2kg2] a. What is centre of gravity? 1 b. The acceleration due to gravity at the surface of the earth is proportional to the distance from the centre of the earth-explain. 2 c. What is the gravitational potential at point O? 3 d. At point O the object will be static – explain mathematically. 4 5. The density of two liquid A and B is 100 kgm3 and 800 kgm3 respectively. From liquid A a wire of 0.1m length is taken horizontally. Then a sphere made of Iron of 4mm radius and density of 7.8 103 kgm3 was taken to both the liquid.The velocity of A and B is 2.36 102 ms1 and 4 102ms1. [Surface tension of A is 72 103 Nm1 and g = 9.8 ms2] a. What is an elastic limit? 1 b. Potential energy is accumulated when the wire expands-explain. 2 c. Calculate the applied force when the wire was pulling up. 3 d. Which liquid is more viscous- justify your answer mathematically. 4 6. P P X- gas X- gas 21 kPa 15 kPa T2 = 305K T1 = 305K O V1 V O V2 V 10 mole of two different types of gas X and Y is preserved in two different containers having a mass of 325 gm and 288 gm respectively. The above figure shows the relation between pressure to volume. a. Define relative humidity. 1 b. The dew point in Kushtia is 15C –what do you understand by this? 2 c. Compare the volume of two gases given in the stem. 3 d. Which container will be empty if kept open justify your answer mathematically. 4 Board Exam Questions 31 7.The equation of a progressive wave which creates standing wave latterly is given below: Y = 0.5 sin 800 t 2 x 0.5 a. What is wave front? 1 b. There is no Octave in Triad- explain. 2 c. What is the wave velocity of the progressive wave? 3 d. Compare the frequency of standing wave and original wave of the stem mathematically. 4 8. The length of the wire of the simple pendulum is 1.1m and radius of the bob is 1.5 cm, mass of the bob is 60gm. OA is in a static condition. In the figure, QC = 3cm and PB = 2cm [g = 9.8 ms2] O 1 2 Q P A C B a. Define periodic motion. 1 b. From force-displacement graph calculate the work done of a spring expansion- explain. 2 c. Calculate the time period of simple pendulum.3 d. Compare the effective force at A, B and C point-explain mathematically. 4 Chattogram Board-2017 Physics: First Paper Time 25 minutes Creative Multiple Choice Questions Subject Code 1 7 4 Full marks 25 [N.B. Choose the best answer among the options. Fill the circle on the answer sheet with ballpoint pen. Each question has value 1.] 1. Which one is the equation to 6. With relation to AB axis, what Read the stem below and answer questions will be the momentum of inertia 11 and 12: determine the radius of curvature of the disc? A gas’ volume is doubled while keeping for a surface with a spherometer? 2 2 1 2 1 d h d h it in 20C temperature and at constant a. Mr b. Mr2 a. R = + b. R = pressure. 4 2 6h 2 6h 2 2 2 11. Which of the law is supported by 3 d h d h c. Mr2 d. Mr2 c. R = + d. R = + the stem above? 2 4h 2 6h 4 a. Boyele’s law 2. If earth was at resting position Read the stem below and answer questions b. Charles’ law then at any place of earth an 7 and 8: c. Law of pressure A simple pendulum’s amplitude is A object’s weight — d. Avogadro’s law and time period is T. For the pendulum’s a. will increase b. will be zero 12. What is the final temperature of A c. will be infinite d. will be same x = displacement time period is t the gas? Read the stem below and answer questions 2 a. 273 3 and 4: second. b. 300C Young’s module of a wire of 100 cm and cross 7. Maximum velocity of pendulum c. 313C section area of 1 102 cm2 is 1.24 1011Nm2. 2 2A d. 586C a. b. Its length was increased 0.2 by pulling it. T T 13. Which one is the dimension of 3. How much work was done? A A coefficient of viscosity? a. 0.114J b. 0.124J c. d. T 2T a. ML2T1 b. ML2T2 c. 0.248J d. 0.288J 8. Time period t =? c. ML1T2 d. ML1T1 4. In this case T T 14. If the intermediary angle between i. Strain = 0.002 a. b. force and displacement is then 2 4 ii. Stress = 2.48 108 Nm2 the condition of negative charge T T iii. Stress Strain c. d. would be Which of the following is correct? 8 12 a. 90 a. i and ii b. i and iii Read the stem below and answer questions b. 90 180 c. ii and iii d. i, ii and iii 9 and 10: c. 180 90 Read the stem below and answer A questions 5 and 6: d. 90 90 Object’s mass = A 1 2 m X 15. s = at equation’s s indicates 2 g r displacement, t time and a acceleration. Mass of disc = M O C B Which of the following is correct? 9. The object reaches C from A a. at uniform negative Y a. b. s B s acceleration. 5. With relation to a solid disc’s XY axis, b. at uniform acceleration. O O t t c. at uniform velocity. momentum of radius of gyration d. at non-uniform velocity. r r c. d. a. b. 10. What is the acting force on object 2 2 s s while descending along AC surface? 3 a. mg b. mg cos O O c. r d. r t t 2 c. mg sin d. zero Panjeree HSC English Version Test Papers Made Easy Physics First Paper 32 16. k1 Read the stem below and answer questions 19 and 20: k2 m Ans. If m is pulled and then released then the frequency of vibration is — 1 k1 k2 a. f = 2 m 1 m b. f = 2 k1 + k2 1 k1 + k2 c. f = 2 m 1 m d. f = 2 k1 k2 17. 2kg object’s momentum if is 2kg ms1 then its kinetic energy is-? a. 1J b. 1.5J c. 2J d. 4J 18. According to the diagram, a particle is moving along a half circular path of 2m radius. The particle reaches P from Q in 2sec. What is the average velocity of the particle? a. 1 ms1 b. ms1 c. 2 ms1 d. 2 ms1 a. P . Q = 0 b. P . Q = 0 t(sec 8 2 46 ) 19. Wavelength of the wave is-? a. 35 cm b. 40 cm c. 60 cm d. 70 cm 20. Wave’s velocity is -cms1? a. 8.75 b. 10.0 c. 15.0 d. 17.5 Y|A|= 15N b. V = 0 c. V = 0 d. . V 0 22. Which one is the graph for ideal gas’ kinetic energy (E) vs temperature (T)? E O b. E T d. O T E E O T O T d. P Q = 1 21. When will be vector V a solenoid? a. .V = 0 c. P Q = 0 c. for P and Q to be perpendicular? 70 cm y(cm ) a. 23. Which one is the right condition |B|= 60 10N 24. Based on the diagram aboveX|A + B| = ? a. 15.81 N. b. 14 N. c. 13.23 N. d. 11.23 N. 25. If mass and radius of an imaginary planet is increased then the escape velocity from surface could — i. increase ii. decrease iii. stay same Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 1 a 2 a 3 c 4 d 5 a 6 a 7 b 8 d 9 b 10 b 11 b 12 c 14 b 15 c 16 b 17 a 18 c 19 b 20 b 21 a 22 c 23 a 24 c 25 d Creative Essay Type Questions Time: 2 hours 35 minutes 13 d Full marks: 50 [N.B. The numbers on right side show the marks distribution.Read the stems attentively and answer five questions out of eight.] 1. B C 30 D Current 63.43 A According to the diagram, a river is 31km wide. Two boats started from the same point A at same speed to cross the river. One is going along AB and another one along AC. First one reached point C after crossing the river though the second one reached point D. Velocity of current was 9km h1. a. What is position vector? 1 b. Explain if the kinetic energy at the highest point of a projectile course is zero. 2 c. Determine the same speed of the boats from stem above. 3 d. Mathematically analyse and opine if the two boats will reach the other bank at the same time. 4 2. In the chart below velocity and displacement of a 10gm moving particle are shown: t(s) 0 2 4 6 8 10 6 10 14 18 22 v(ms1) 2 s(m) 0 8 22 48 80 120 a. Define 1 mol. 1 b. Draw a v vs t graph from the information above and give your opinions on velocity. 2 c. Determine the distance that the particle crossed in ninth second. 3 d. Analyse if the work done in 6th second and work done in 6 seconds is same for the particle. 4 3. A group of scientists sent a 100 kg artificial satellite at 3.6 104km height and gave it 3.1km/s linear velocity thus attempted to make a moon like satellite. Mass and radius of earth are respectively 81 and 16 times of moon’s mass and radius. Distance from earth to moon is 3 105km. Gravitational acceleration on earth is 9.8 ms2, Gravitational constant is 6.673 1011 Nm2kg2. a. What is Horse power? 1 b. Explain the work done by centripetal force. 2 c. At which point in between the distance of earth and moon, gravitational intensity will be equal? 3 d. Mathematically analyse if the satellite mentioned in the stem will be a satellite similar to the moon. 4 4. Two wires of 2mm and 4mm radius and same length are hanged from a firm support. As two equal weights are attached with both wires, the length expansion for the second one seemed to be one-third of the first one. Poisson’s ratio of second wire is 0.4. Board Exam Questions 33 a. What is gravitational constant? 1 b. Describe the reason of rise and fall of liquid in a capillary tube. 2 c. If length of the second wire is increased 5% how much of its radius will decrease? 3 d. Between these two wires which one is more elastic? Explain mathematically. 4 5. A particle that is moving in a simple harmonic motion weighs 100gm. Maximum amplitude is 10cm. The time required to reach maximum amplitude from equilibrium is 0.5s. a. What is elastic fatigue? 1 b. Why the raindrops fall at a constant velocity? Explain. 2 c. For the mentioned particle, determine its velocity at 8cm displacement. 3 d. Give your opinions with mathematical explanation if kinetic energy in equilibrium and potential energy at amplitude is equal. 4 6. Three wires of equal length A, B and C are attached with a sonometer. And three weights of 200, 225 and 250N are attached with them respectively. As the wire A was sounded it produced a sound of 100Hz. An experiment was done to see if there is a bit produced when two wires are sounded together. a. What is relative humidity? 1 b. If two springs of same spring constant are connected in a parallel combination will the spring constant for parallel spring change? Describe. 2 c. Determine the frequency of second wire. 3 d. Mathematically analyse the experiment of bit production. 4 7. In a cylinder, 3gm Helium is kept at 127C temperature and 72cm mercury pressure. Same amount of helium gas is kept in another cylinder at STP. a. What is force vibration? 1 b. Explain why banking is necessary in a curve road. 2 c. Find out the volume of gas in first cylinder. 3 d. Determine the kinetic energy for both cylinders and analyse the results in comparison with temperature. 4 8. A water filled well’s depth and radius is 20m and 2m respectively. An engine of 5HP is attached to pump out the water. The pump was ruined after emptying half of the water. Then to pump out rest of the water another pump of same power was attached. a. Give definition of torque. 1 b. If earth is nearer to sun its velocity increases. Explain in light of Kepler’s law. 2 c. Determine the work done by the first pump. 3 d. Mathematically analyse if the time required for pumping out water would be same for both pumps. 4 Sylhet Board-2017 Physics: First Paper Time 25 minutes Subject Code Creative Multiple Choice Questions 1 7 4 Full marks 25 [N.B. Choose the best answer among the options. Fill the circle on the answer sheet with ballpoint pen. Each question has value 1.] 1. Which one is sound intensity level Check the stem below and answer 7. Average kinetic energy of one molecule gas is-? in decibel unit? questions 4 and 5: 1 3 I I a. KT b. KT a. = log b. = 10 log Y 2 2 0.02 I0 I0 m A B C X 2 O I I c. KT d. 3 KT c. = 10 d. = 3 I0 I0 0.03 second 8. Kinetic energy of 2 mole ideal gas 2. If sound intensity is 102 Wm2 0.6 m in S.T.P is-? [R = 8.31 J mole1 K1] then what would be the sound This is a forward wave. a. 1300 J b. 2700 J intensity level? 4. Phase difference between A and B c. 3403 J d. 680 J a. 10 dB b. 100 dB point is-? 9. Which one is S.I unit of length? c. 110 dB d. 150 dB a. Centimetre b. Mile a. 0 b. c. Meter d. Foot 3. If a forward wave’s initial phase is 2 2 10. 3 then which one is the displacementc. d. B 2 time graph for the wave? 60 5. A similar but opposite directional Y wave incidents upon the given A wave at x distance the product a. O X Value of A and B both vector is 5 wave’s equation would be — Y unit. Their intermediary angle is a. Y = 0.04 cos 5 x sin 100 t Y b. Y = 0.04 cos 5 x sin 200 t 60. Determine |A B|. b. a. 0 b. 5 unit X c. Y = 0.04 cos 5 x sin 300 t O c. 7.07 unit d. 8.66 unit d. Y = 0.04 cos 5 x sin 400 t c. Y 6. Relation between unit volume 11. An object is thrown upward at 0 initial velocity. Which of the mean kinetic energy and pressure X O following describes its height? of 1 mole ideal gas is — 2 3 Y a. H = 0 b. H = 0 a. P = E b. P = E d. g 2g 3 2 2 X 2 O 2 1 c. H = 0 d. H = 0 c. P = E2 d. P = E 2g g 3 3 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 34 Check the stem below and answer questions 12 and 13: Velocity v v0 = 100 A object B object h = 500 m O Time t A and B are two objects of equal mass. A is thrown upwards and B is released from up along the same throwing line. Their velocity-time graph crosses at the point O. (g = 10ms2) 12. If B falls independently then just at the moment of falling on ground its velocity will be-? a. 7 ms1 b. 10 ms1 c. 71 ms1 d. 100 ms1 13. Which one is correct? a. Objects will meet at point O b. Kinetic energy of both objects is equal at point O c. Potential energy of both objects is equal at point O d. Object will meet at a time indicated after O Ans. 14. Relation between object’s kinetic energy and momentum — m a. K = p 2m b. K = 2 p p2 p c. K = d. K = 2m m 15. The work done by a force acting on an object is equal to the change of which quantity? a. Kinetic energyb. Temperature c. Density d. Potential energy Check the stem below and answer questions 16 and 17: m1 = 5kg Before collision m2 = 6kg A B 4ms 5ms1 1 After B A 5ms1 A and B are moving from opposite direction and collides. After the collision they started moving at the opposite direction of their initial movement. 16. What is the velocity of object B after collision? a. 2.50 ms1 b. 4.17 ms1 c. 5.83 ms1 d. 12.50 ms1 17. In case of the collision above i. Momentum will be conserved ii. Kinetic energy will be conserved iii. Collision will be non-elastic Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 18. Which one is dimension of energy? a. MLT2 b. ML2T2 c. ML1T1 d. MLT1 19. A spring is expanded i. It gains potential energy ii. It gains restoring force iii. Its potential energy is the work done by restoring force Which of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 20. Velocity of an artificial satellite which is orbiting earth from h height GM GM a. = b. = R+h (R + h)2 GM2 GM c. = d. = R+h R+h 21. At surface of Mars, g = 3.8 ms2 and its radius is 3 103 km. Escape velocity at the surface of Mars is-? a. 4.0 kms1 b. 4.8 kms1 c. 7.8 kms1 d. 11.0 kms1 22. In case of Gravitational voltage — GM i. V = r ii. Its unit is Jkg1 iii. It is a vector quantity Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 23. Which one is Young’s modulus? Length stress a. Y = Length strain Volume stress b. Y = Volume strain Shear stress c. Y = Shear strain Shear stress d. Y = Length strain 24. m is an object’s mass. It is moving in a simple harmonic motion. Its time period will be 1 m m a. T = b. T = 22 K K2 2 m 1 m c. T = 2 d. T = K 2 k2 25. In simple harmonic motion i. Acceleration is proportional to displacement. ii. Acceleration is always towards a certain point. iii. The force working always obeys reverse square rule. Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 1 b 2 b 3 d 4 c 5 a 6 a 7 b 8 d 9 c 10 b 11 c 12 d 14 c 15 a 16 a 17 b 18 b 19 d 20 d 21 b 22 a 23 a 24 c 25 a Time-2 hours 35 minutes Creative Essay Type Questions 13 b Full marks: 50 [N.B.: The numbers on right side show the marks distribution.Read the stems attentively and answer five questions out of eight.] 1. Nort h West East Sout h A bird is flying in parallel with land like the diagram above. The amount of push generated by both wings is 5N. a. What is Curl? 1 b. How our walking by foot is explained by vector resolution? 2 c. What is the reactionary force along OC of the diagram above? 3 d. If the amount of push is doubled along AO then in which direction would the bird fly? Explain mathematically. 4 2. Two cars A and B started their journey with velocity of vA = 0 and vB = 22.5ms1. And for the first 15 second their acceleration rate was aA = 1ms2 and aB = 1ms2. Later both cars went on for 15 more seconds at uniform velocity. a. What is instantaneous velocity? 1 b. Why the velocity at the highest point of a projectile trajectory is lowest? Explain. 2 c. After starting journey when the velocity of both car will be same? 3 d. Which car will cover more distance? Give your opinion with mathematical analysis. 4 Board Exam Questions 35 3. The intermediary distance between two rails of meter-gauge and broad-gauge rail line is 0.8m and 1.3m respectively. Where the radius of turning is 500m there the difference between the heights of line is 7.00 cm and 11.37 cm respectively. a. What is torque? 1 b. ‘If two objects of equal mass falls into an elastic collision they exchange velocity’Explain. 2 c. What is the banking angle for first line? 3 d. In which line the train can turn more quicklyGive your opinions with mathematical analysis. 4 4.Adiba was working with a simple pendulum (like the diagram) A = CD = 0.03m in lab. She found that for a specific D displacement, that 1 pendulum’s kinetic V = 0.1 ms max C energy and potential energy is W = mg same from the equilibrium. a. What is periodical motion? 1 b. Why in a periodic motion the initial phase angle is constant? Explain. 2 c. Determine the time period of the mentioned simple pendulum. 3 d. Explain mathematically if the conclusion that Adiba found out is acceptable or not. 4 5. Liana, a student of physics took two tuning fork and saw that on one 312 Hz is inscribed. She sounded both tuning fork at the same time and heard 6 bits. Now she curled a wire on the unidentified tuning fork. She heard the same number of bits as she sounded this one. Here, the velocity of sound from the known identified tuning fork is measured as 3.40 ms1. a. What is wave front? 1 b. Why the energy at the motionless point of a stationary wave is zero? Explain. 2 c. After completing how many complete vibrations does the sound generated from identified tuning fork covers 130m distance? 3 d. Did Liana find any difference in the frequency of unidentified tuning fork before and after she added the extra mass? Explain mathematically. 4 6. Temperature of a room is 32C, dew point is 14C and relative humidity is 48%. At that time temperature outside was 11C and relative humidity was 70%. Saturated vapour’s pressure at 32C and 11C temperature is 33.6mmHg and 9.8mmHg and glacier constant at 30C is 1.63. a. What is Root mean square velocity? 1 b. Explain the necessity of pure mercury pillar to determine ideal pressure. 2 c. In that room, for moist and dry bulb hygrometer, what will be the temperature reading of moist bulb? 3 d. If a window is opened then at which direction will the vapour flow? 4 7. Artificial satellite of a planet is rotating in a circular orbit at 7.8k ms1 velocity where gravitational acceleration is 9.0ms2. The ratio of mass and radius of another planet and the one mentioned here is 80:1 and 4:1. a. What is gravitational constant? 1 b. Why objects weigh less at equinoctial region? 2 c. Determine the height of circular orbit. 3 d. If a spaceship travels between these two planets from which planet will require more kinetic energy for launching? Give opinions with mathematical explanation. 4 8. As a weight is attached with a wire, its length doubled and diameter became one-third of original. Element Y-value D Aluminium 7 1010 Nm2 L Iron 11.5 1010 Error! Nm2 2 Copper 13 1010 Nm2 Steel 20 1010 Nm2 m = 10 a. What is elastic limit? 1 b. Temperature of stored O2 gas in two cylinders is 20C and 25C respectively. Which gas has more viscosity? Explain with proper reasons. 2 c. Determine the Poisson’s ratio for mentioned wire. 3 d. If diameter of wire = 4.22 102 mm then according to the information given in stem the wire is made of which element? Give your opinion with mathematical analysis. 4 Jashore Board-2017 Physics: First Paper Time 25 minutes Subject Code Creative Multiple Choice Questions 1 7 4 Full marks 25 [N.B. Choose the best answer among the options. Fill the circle on the answer sheet with ballpoint pen. Each question has value 1.] Answer questions 2 and 3 based on 1. Value of gravitational Which one is right? the information: acceleration changes for — a. i and ii b. i and iii 2. What is the percentile error for i. Height c. ii and iii d. i, ii and iii that object’s density? ii. Orbital rotation of earth Mass of an object is (100kg 2%) and 3 a. 10 b. 5 iii. Earth’s rotation on its own axis volume is (10m 3%). c. 0.5 d. 0.1 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 36 3. Which is the correct value of the absolute error for that object’s density? a. 5kgm3 b. 5gmm3 c. 0.5kgm3 d. 0.5kgft3 4. Dew is a. Water drop b. Temperature c. Heat d. Moisture An object is thrown at 60 with horizontal and at 10ms1 velocity. Answer questions 5 and 6 based on the information. 5. What is the horizontal velocity? a. 3ms1 b. 4ms1 1 c. 5ms d. 6ms1 6. What is the ratio between potential and kinetic energy at peak height? a. 1:2 b. 1:1 c. 3:2 d. 3:1 7. Which one is a general characteristics of substances? a. Surface energy b. Viscosity c. Elasticity d. Surface tension 8. The time period ratio for two artificial satellites of R and 4R radius which are rotating in a circular orbit would be a. 8:1 b. 4:1 c. 1:4 d. 1:8 9. Action and reaction forces are F1 and F2. So, — i. F1 = F 2 ii. F 1 = F 2 iii. F1. F2 = F1F2 | | | | Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 10. 'PV' quantity, for a gas expresses — a. Energy b. Power c. Momentum d. Inertia Answer questions 11 and 12 based on the information below: P In the diagram, mass and length of the thin and symmetrical rod is c. and L. 11. Which one is the mass of the smallest portion of the rod, dx? a. ML1x b. MLx1 c. ML1dx d. MLdx 12. Which one is the integral expression of momentum of inertia with respect to PQ rotational axis? L L M M 2 a. L x dx b. L xdx 0 0 L 0 M M 1 2 c. L x dx d. L x dx 0 L 13. For which intermediary angle of force and displacement there will be work done by the force? a. 60 b. 120 c. 180 d. 210 14. A fan is rotating 30 times per minute. What will be its angular velocity? a. rads1 b. 2rads1 c. 15rads1 d. 60rads1 15. A particle’s harmonic motion equation is — x = 10 sin (6t + 3). What is the frequency? a. 1.5Hz b. 3Hz c. 6Hz d. 10Hz 16. A graph of final velocity versus time is given for an object drowning in water. Which is correct? a. vc 0 A vc b. t 0 t B c. vc vc d. ^ ^ The diagonals are AC = i and BD = j 0 t 0 t P Distanc e (y) C Time (t) X O A B Y Q Ans. C ^ i Y x D ^ j Answer 17 and 18 based on the stem below: dx A forward wave is given above. 17. The phase difference between O and P is-? 3 a. b. 2 2 5 7 c. d. 2 2 18. In the diagram, the ratio of path difference of A and C with respect to P is? a. 3:4 b. 3:2 c. 2:1 d. 4:3 19. The time period of a pendulum clock in summer is 2.002sec. How slow will the clock be in an hour? a. 2.5s b. 3.6s c. 4.5s d. 6.6s 20. Level error is applicable for which one? a. Screw gauge b. Metre scale c. Optical spectroscope d. Spherometer 21. In a river with current, to cross the river at least time at which angle with current should be the boat rowed? a. 45 b. 60 c. 90 d. 120 22. Accuracy of measurement is related with? i. Error ii. Apparatus iii. Mistakes Which of the following is correct? a. i and ii b. ii and iii c. i and iii d. i, ii and iii Based on the diagram below answer questions 23 and 24: 23. AB vector’s right form is-? ^ ^ a. (i + j)/4 ^ ^ b. (i j)/2 ^ ^ ^ ^ c. (i + j)/2 d. (j i)/2 24. ABCD parallelogram’s area is-? a. 0.5 unit b. 1.0 unit c. 1.5 unit d. 2.0 unit 25. Which one is the dimension equation of impulse of force? a. ML1T2 b. MLT1 c. MLT2 d. M1LT2 1 b 2 b 3 c 4 a 5 c 6 d 7 c 8 d 9 a 10 a 11 c 12 a 14 a 15 b 16 c 17 c 18 c 19 b 20 c 21 c 22 d 23 b 24 a 25 b 13 a Board Exam Questions 37 Creative Essay Type Questions Time-2 hours 35 minutes Full marks: 50 [N.B. The numbers on right side show the marks distribution.Read the stems attentively and answer five questions out of eight.] 1. A boat is crossing a river from point A along AD where the river is 2.5 km wide. B 4. In the graph the change of gravitational force F is shown for a 1000kg object at different distances with the distance from the centre of the moon r. F 2.5km 1.6 D Li ne of B o at A Curren t flo w x103N ^ ^ Boat’s velocity in calm water = (3i + 3j) ms and ^ velocity of current = 2i ms1, in another case the boat goes along AB at same velocity. a. What is free vector? 1 b. When the work done by restoring force will be negative? Explain. 2 c. Determine the unit vector along river surface’s perpendicular. 3 d. According to the stem, in which case the boat will reach the other bank faster? Explain mathematically. 4 2. A golf player in (i) and (ii) conditions, hit the ball from point O to put the golf ball in the hole. 1 v0 = 4 0ms 20m 45 Hole O 160m 30m Figure-(i) v0 = 4 0ms1 20m 45 Hole O 100m Figure-(ii) 160m a. What is gravitational intensity? 1 b. What do you understand by- An object’s angular acceleration is 3 rad s2? 2 c. What will be the ball’s velocity after 2 sec? 3 d. For which figure mentioned in the stem, the ball will fall in the hole? Explain mathematically. 4 3. A 30 gm marble hit another stationary marble at 10 ms1 velocity. After the collision, first marble lost its 75% velocity, the latter marble gained 9 ms1 velocity and hit a clay wall at 3m distance. The obstructing force of the wall is 3N. (Ignoring the air resistance) a. What is elastic fatigue? 1 b. Explain if all measurement apparatus have backlash error. 2 c. Determine the mass of stationary marble. 3 d. Mathematically analyse if the marble can enter into the wall. 4 1.0 0.5 1 0.25 Radius r 1.75 2.2 3.1 4.3 6 X10 m Given that, radius of earth is 6.4 106m, Gravitational acceleration on earth is g = 9.8 ms2; G = 6.67 1011Nm2 kg2 a. Write down second law of Kepler regarding planetary motion. 1 b. Explain why there is no torque with the rotation of Earth. 2 c. Determine the mass of Moon based on the information above. 3 d. Based on the given data, compare the gravitational force working on the object if it is kept at 2.55 106 m height from earth and moon. 4 5. A heavy 250N symmetrical object XY is hanged from two equally long wires A and B horizontally. It is shown in the diagram (uncompressed state). Cross sectional area of each wire is 2.5 107m2. B wire’s longitudinal strain is 2.5 104, A wire’s 0.8m is made of brass and the rest is steel. Young’s modulus for steel = 2 1011Pa Young’s modulus for brass = 1 1011Pa 0.8 m Brass 1.2 m Steel A Brass B Y X 250 N a. Write down the dimension equation of viscosity coefficient. 1 b. How will be a simple pendulum’s oscillation at the centre of earth? 2 c. Determine the energy stored in unit volume of B wire. 3 d. Which end of the bar will be lower than another? Check. 4 38 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 6. Mass of a simple pendulum’s bob is 1.2 102kg. It is swinging at an amplitude of 51 mm. It takes 49.75 sec to complete 25 oscillation. Radius of earth is 6.4 106m. a. What is the Conservation of Mechanical Energy? 1 b. Explain the absorption of water by a tissue paper. 2 c. Determine the length of the pendulum. 3 d. If the pendulum is taken at 53760 m height from earth surface than explain the change in restoring force for maximum displacement of the bob. 4 7. Equation of two sound wave in air is given below: Y1 = 0.25 102 sin 16.35(105.1t x) Y2 = 0.25 102 sin 110(15.764t 0.15x) Here all units are expressed in SI system. Density of air is 1.29 kg m3. a. What is resonance? 1 b. Why not all overtone of diatonic scale are harmonic? Explain. 2 c. If both waves are sounded together determine the number of bit it creates. 3 d. With intensity level explain if the sound made by the second wave is suitable for hospitals. 4 8. A student keeping the pressure constant, increased the temperature of some O2 gas which was initially in ideal temperature. So, the volume doubled. And so his friend said that the mean square velocity of the molecules of experimented gas will be doubled too. a. What is impulse of force? 1 b. Explain the change in velocity if a stationary heavy object is hit by a light moving object. 2 c. Determine the final temperature. 3 d. Mathematically check the truthiness of the comment that the friend made. 4 Barishal Board-2017 Physics: First Paper Time 25 minutes 1. 2. 3. 4. 5. Subject Code Creative Multiple Choice Questions 1 7 4 Full marks 25 [N.B. Choose the best answer among the options. Fill the circle on the answer sheet with ballpoint pen. Each question has value 1.] Unit of impulse of force similar 6. Which one is the dimension of 11. Which one is PV versus P graph to which one? viscosity coefficient? at b constant temperature? a. Force a. [ML1T1] b. Momentum b. [ML1T2] a. b. c. Work c. [ML2T2] d. [ML2T3] d. Torque 7. Which one is not a characteristic An object of 100gm at a 30 of simple harmonic motion? inclined angle on a 5m road will a. Displacement of particle is have kinetic energy of function of sine or cosine. c. d. a. 0.49j b. 0.848j b. Direction of force towards Read the stem and answer questions c. 1.225j d. 2.45j equilibrium. Which is not the characteristic of c. Kinetic energy is least at 12 and 13: Length of a simple pendulum’s thread is non-conservative force? equilibrium. 79.2cm and radius of bob is 0.8cm. a. Work done is zero d. Value of acceleration is (Gravitational acceleration is 9.8ms2.) b. Does not depend on path opposite of displacement. c. Law of conservation of 8. 100gm object fell into water and 12. Time period of the pendulum is? a. 0.5077 s b. 0.5129 s mechanical energy is not so the buoyancy is 0.981N. c. 0.8976 s d. 1.7952 s applicable. Viscosity force is — 13. If the pendulum is converted into d. Possible to recover the work a. 9.81N b. 0.981N second pendulum that has been done c. 0N d. 1.962N i. It will be faster What is the name of Kepler’s 9. Kinetic energy of a molecule of 12 ii. Time period will be 2 sec third law? independent dimension would iii. Thread length should be a. Law of orbit b. Law of area be — increased 19.29cm c. Law of time period 1 3 Which of the following is d. Harmonic law a. KT b. KT 2 2 correct? An object will become an c. 6 KT d. 12 KT a. i and ii b. i and iii artificial satellite if it is thrown c. ii and iii d. i, ii and iii at how many times speed of 10. Which of the following would be a triad? 14. Surface tension of liquid depends escape velocity? a. 120 : 240 : 360 1 1 on a. Ve b. Ve b. 80 : 100 : 120 2 i. Radius of capillary tube 2 c. 100 : 150 : 125 ii. Cohesion force c. 2 Ve d. 2 Ve d. 180 : 240 : 300 iii. Density of liquid Board Exam Questions 39 Which of the following is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii Which does not happen in case of sound wave? a. Reflection b. Refraction c. Interference d. Polarization If a wave with 200 complete vibration, in 0.25sec crosses 8m distance, wavelength would be a. 8cm b. 4 cm c. 32 cm d. 25 cm If intensity level is changed 1 dB then the change of sound intensity will be? a. 10% b. 26% c. 50% d. 100% Strong nuclear force is generated due to exchange of which particle? a. Graviton b. Boson c. Photon d. Meson 15. 16. 17. Ans. 18. 19. Real value of a sphere’s radius is 3cm and measurable radius is 2.98 cm. What is the percentile error measuring its volume? a. 0.02% b. 0.066% c. 0.66% d. 2% ^ ^ 20. A = (px + y) i + (y 2z) j + (x + ^ 3z) k vector will be solenoidal if p= a. 2 b. 4 c. 3 d. 4 ^ ^ ^ ^ 21. (i × k ) × (j × k ) = ^ ^ a. 0 b. i ^ ^ c. j d. k 22. A vector with only one foot point is known as? a. Co-planer vector b. Co-linear vector c. Co-starting vector d. Restricted vector 23. If two equal forces’ resultant is half of any one of them what is the intermediary angle between them? a. 28.90 b. 41.40 c. 138.6 d. 151.04 24. A rifle can shoot at 300ms1 velocity and 40 and 50 angle. For the two bullets i. Perambulation period will be different. ii. Range will be equal. iii. Horizontal component of their own velocity will not change. Which one is correct? a. i and ii b. i and iii c. ii and iii d. i, ii and iii 25. An object’s velocity is v(t) = (6t2 + 2t) ms1. Its displacement after 2 sec is-? a. 20m b. 26m c. 28m d. 56m 1 b 2 d 3 a 4 c 5 a 6 a 7 c 8 c 9 c 10 b 11 c 12 d 14 d 15 d 16 b 17 b 18 d 19 d 20 d 21 d 22 d 23 d 24 d 25 a Creative Essay Type Questions Time-2 hours 35 minutes 13 c Full marks: 50 [N.B. The numbers on right side show the marks distribution.Read the stems attentively and answer five questions out of eight.] 1. Coordinates of two points A and B are given below: A(2, 3, 1) = 60 B(4, 2, 3) O a. Define null vector. 1 b. Explain why a heavy object is pulled at a lesser angle. 2 c. Determine the connecting vector of AB. 3 d. Will the triangle mentioned in stem make a right angle triangle? Analyse and give your opinion. 4 2. A 60kg dancer can rotate 20 times a minute while spreading her hands. She was trying to find her rhythm with a music. a. What is radius of gyration? 1 b. If the momentum of inertia for a person who is rotating around own axis is half then angular motion is doubled. – Write down its significance. 2 c. If the dancer needs to rotate 30 minutes to find the rhythm with music, then compare between the momentums of inertia. 3 d. Will the changed angular kinetic energy for the dancer be double? Analyse and give opinion. 4 3. In the diagram, an object of 1kg mass is seen to have simple harmonic motion and the energy vs displacement graph is shown below. Amplitude is 0.01m and frequency is 12Hz. Total energy Kinetic energy Potential energy A +A x= A 2 O x= A 2 a. What is second pendulum? 1 b. Not all motion of pendulum is simple harmonic. Explain. 2 A c. At x = position, determine the velocity. 3 2 Panjeree HSC English Version Test Papers Made Easy Physics First Paper 40 A and x = A positions, determine if the 2 law of conservation of mechanical energy will be maintained. 4 4. To create a transverse wave in a 16m long wire, periodic force is applied and the forward wave’s x equation would be y = 2 sin 30t . All 4 quantities are expressed in SI system. a. What is tune? 1 b. The work done by an object rotating in a circular path is zero. Explain. 2 c. Determine the frequency that is created in the wire. 3 d. For the mentioned wire, due to the movement would the loop created there be of even number? Give your opinions with mathematical analysis. 4 5. A gramophone record can do 10 rotations per minute. Radius of two tracks on it are of 6cm and 8cm respectively. a. Define Inertial frame of reference. 1 b. “Even if average velocity is zero average speed is never zero” – Explain this. 2 c. Determine the linear speed of the tracks. 3 d. If the gramophone rotates at 10% increased angular speed then will the sound intensity change? Analyse. 4 6. Some students at physics lab observed that as air bubble comes from the bottom of pure water, volume becomes 1.1 times. In one step of the experiment, as a student mixed another liquid density of water doubled. (Atmospheric pressure is 105Nm2.) a. What is dew point? 1 b. Saturated atmospheric pressure is highest at one place. Explain. 2 d. For x = ( ) c. If the water temperature is constant, then what is the container’s height? 3 d. After mixing the liquid will there be any change in the bubbles’ volume? Give opinions with mathematical analysis. 4 7. A steel plate is of 1m2 area and its thickness is 8mm. Its lower part is attached firmly and by applying force on the upper part rigidity was created. Modulus of rigidity for steel is 8×1010Nm2. a. What is marginal velocity? 1 b. Though in terms of number surface tension is equal to surface energy they are not same. Explain. 2 c. If rigidity strain is 0.3 then how much force should be applied? 3 d. If the plate is placed on a 2mm thick liquid of 8.5Nsm2 viscosity coefficient and 500ms1 kinetic energy is created, would the required force be same? Give your opinion. 4 8. Earth moves around its own axis once in every 24 hours, it is known as diurnal motion. Due to this rotational motion, gravitational acceleration on earth is not equal everywhere. Radius of earth is 6400 km and gravitational acceleration on surface is 9.8ms2. a. What is escape velocity? 1 b. Why gravitational constant is a scalar quantity? 2 c. Determine gravitational acceleration at earth’s 45 latitude. 3 d. For an object’s gravitational acceleration be zero at equinoctial region, how should earth’s angular motion change? Analyse. 4