CAMBRIDGE SCHOOL SRINIVASPURI
PERIODIC TEST -I(2023-24)
PHYSICS (042)) - SET B
CLASS- XI
M.M.: 30
TIME: 60 min.
General lnstructions:
(I) There are 22 questions in this question paper.
(2) Allquestions are compulsory.
(3) Section Aconsists of i0 multiple-choice questions carrying lI mark each.
(4) Section Bconsists of 2 very short answer questions carrying 2 marks each.
(5) Section C consists of I short answer question carrying 3marks.
(6) Section Dconsists of 2case-based questions carrying 4 marks each.
(7) Section Econsists of I long answer question carrying 5 marks.
(8) Use of calculators
not allowed.
SECTION A
Select and write one most appropriate option out of the four options given for each of the Q |- 10.
Which of the following is not unit of length?
(c) Astronomical Unit.
(a) Light year.
(d) Barn
(b) Parsec
Which of the following physical quantities doesn't have the dimensional formula ML'T2
2
(a) Kinetic energy
(b) work
(c) momentum
(d) torque
Two quantities Aand Bhave different dimensions. Which mathematical operation may be physically
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meaningful
(a) AB
(6) A+B
(c) A-B
(d) A=B
When an object travels equal distances in equal intervals of time, howsoever small the interval may be,
the motion of the object is said to be
{b) non-niform
la) uniform
(d) oscillatory motion
(c) circular motion
The Speed-time graph of a particle moving along a fixed
direction is shown in the figure. The distance traversed by the Speed (ms)
particle between t=2 s to 6 s is
(a) 26 m
(b) 36 m
(c) 46 m
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(d) 56 m
10
Tme ()
Acar moves a distance of 200 km. It covers first half of the distance at speed of 40 km/ hand the second
half of thedistance at speed of v. The average speed is 48 km/h. Find the value v.
(b) 60 km/h
(a)56 km/h
(c) 50km/h
(d) 58 km/h.
What will be the acceleration versus position graph for a graph shown
below:
(a)
(c)
(d)
(b)
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azox
dt oy
A body is thrown vertically upwards. VWhich one of
the following graphs correctly represents the
velocity versus time graph?
(a) a
(c) c
(b) b
(d) d
Q9 and 10 are Assertion - Reasoning based questions. These consist of two statements - Assertion (A)
and Reason (R). Answer these questions selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) BothA and R are true and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is False but R is true.
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Assertion: In quantum mechanics, angular momentum is measured in terms of Planck's constant.
Reason: Angular momentum and Planck's constants have same dimensions.
Assertion: Two bodies of different masses dropped símultaneously from the top of tower hit the ground
simultaneously.
Reason: Time taken a body to fall through certain height is independent of mass of the body.
SECTION -B
I5.74 g of a substance occupies l.2 cm². Express its density by keeping the significant figures in view.
|2
Find the dimensions of the quantity qfrom the expression:T = 2n
mi³q
5Y
2
,where T is time period of a
bar length of l, mass m and Young's modulus Y.
2
SECTION-C
A moving train comes to rest in 20s by the application of brakes. Find the initial velocity if retardation due
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to the brakes is 2ms2, Also calculate the distancecovered by it before it stops.
SECTION-D
Read the passage given below and answer Q 14 to I7 based on it.
a
The Van-der-Waal's gas equation:(P +)(V- b) = RT, where Pis pressure, Vis volume, T is absolute
temperature of a given sample of a gas, R is universal gas constant, a and b are Van-der-Waal's constant.
The dimensional formula for a is same as for
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(a)V2
(b)P
(c) PV2
(d)RT
at
The dimensional formula of R is
I5 (a)MLST-2
(c) ML-1T-2
(b) L³
(d) L6
The dimensional formula for RT is same as for
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(a) Energy
The dimensional formula for RT is
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(a)
ab
(c) Latent heat
(b) Force
(d) Specific heat
same as for
(b) PV
b
v2
(d) PV
Read the passage given below and answer Q18 to 2l based on it.
Mathematical calculation can't increase precision of a physical measurement therefore the number of
significant figures in the sum or product of a group of measurements cannot be greater than minimum
number of significant figures.
18
Acar runs 1200min 22.5 sec. The average speed of car in appropriate significant figures is,
(a) 53.3 m/s
(b) 53.33 m/s
(c) 53.333 m/s
(d) None of these
The radius of a uniform wire r = 0.24 cm. Take =3.142, then the area of cross section up to
appropriate significant figures
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20
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22
(a) 0.180979 cm2
(b) 0.18098 cm²
(c) 0.1809 cm² (d) 0.18 cm?
The volume of sphere is 2.42 cm². The volume of 12 such spheres considering the significant figures.
(a) 29.0 cm?
(c) 29.I cm³
(d) 29 cm?
(b) 29.04 cm?
The number of significant figures in 0.06900 is
(c) 2
(d) 3
(a)5 (b) 4
SECTION -E
Derive second equation of motion graphically moving with uniform acceleration,
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