Physics Test
Std 11 : Physics
Unit Test
Chapters : 2-5
Total marks : 20
Date : 07/07/24
Time : 30 mins
Section A
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Write the answer of the following questions. [Each carries 1 Mark]
1.
The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give
(A) 2.75 and 2.74
2.
(B) 2.74 and 2.73
(B) [M1 L–2 T–2]
(C) [M1 L–2 T2]
(B) [M0L–1T0]
(D) [M1 L1 T–2]
(C) [ML0T–1]
(D) [M0L–1T–1]
Acceleration is first order differentiation of ...... with time.
(A) mass
5.
(D) 2.74 and 2.74
In relation y = asin (wt – kx) dimension of k will be ......
(A) [M0L1T1]
4.
(C) 2.75 and 2.73
...... is the dimensional formulae of Gravitational potential energy. [Oct. - 2013]
(A) [M1 L2 T–2]
3.
[8]
(B) force
(C) displacement
(D) velocity
The displacement of a particle is given by y(t) = a + bt + ct2 - dt4. Hence the initial velocity and initial
acceleration of the particle are ........ and ......... respectively. (a, b, c and d are constants.)
(A) b, - 4d
6.
(B) -b, 2c
(D) 2c, -4d
(C) b, 2c
Displacement of a particle at time t is given by formula S = 15t – 0.4t2. At time ........... its velocity
is 7 ms–1.
(A) 20s
7.
(B) 15s
^
(D) 5s
(C) –45°
(D) 180°
^
The angle between A = i + j and B = i – j is
(A) 45°
8.
^
^
(C) 10s
(B) 90°
^
^
Which of the following is perpendicular to cosq i + sinq j ?
^
(A) cosq ^i + sinq j
^
^
(B) – cosq i + sinq j
^
^
(C) – cosq i – sinq j
^
^
(D) –[sinq i – cosq j ]
Section B
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Write the answer of the following questions. [Each carries 2 Marks]
9.
State for each of the following physical quantities, if it is a scalar or a vector : Volume, mass, speed,
[6]
acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.
10.
If the range covered by an object projected at 15° is 1.5 km, then find the range covered by it for
projection angle 45°.
®
11.
®
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Two vectors A and B make angles of 40° and 120° respectively with the X-axis. Iff | A | = 6 and
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| B | = 5 unit, then resultant vector of these two vectors is ......
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Section C
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Write the answer of the following questions. [Each carries 3 Marks]
12.
A ball is thrown vertically upwards with a velocity of 20 ms–1 from the top of a multistorey building.
[6]
The height of the point from where the ball is thrown is 25.0 m from the ground. (a) How high will
the ball rise ? and (b) how long will it be before the ball hits the ground ? (Take g = 10 ms–2).
13.
A ball thrown in vertically upward direction attains maximum height of 16 m. At what height
would its velocity be half of its initial velocity ?
All the best !!
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