CLASS 11
/09/21
MCQs
FM=
1.Three vectors A, B and C satisfy the relation A.B = 0 and A.C = 0. The vector A is parallel to
(a) B
(b) C
(c) B × C
(d) B.C
2.What is the minimum number of unequal forces whose resultant will be zero?
(a) 1
(b) 2
(c) 3
(d) 4
3.The angular velocity depends upon the rate of change of the?
(a) Angular acceleration
(b) Angular Distance.
(c) Angular Displacement.
(d) Torque
4.A body makes a displacement of 4 m due East from a point O and then makes displacement of 3 m
due North. Its resultant displacement from O
(a) 7 m
(b) 1 m
(c) 5 m
(d) 1.2 m
5.The total flight requires a time that is?
(a) four times the time necessary to reach the maximum height.
(b) thrice the time necessary to reach the maximum height
(c) equal to the time necessary to reach the maximum height.
(d) twice the time necessary to reach the maximum height.
6.The path followed by a projectile is called its?
(a) Territory
(b) Treasury
(c) Tractor
(d) Trajectory
7. When a body P moves on a circular path, the centripetal acceleration is
(a) directed inwards from P, to the centre of the circle
(b) directed tangential to the circumference of the circle, at P
(c) directed perpendicular to the plane of the circle, at P
(d) directed outward, perpendicular to the circumference of the circle
8. Acceleration due to gravity
(a) polar vector
(b) a scalar
(c) a vector
(d) None of these
9. One° (1°) is equal to?
(a) 0.1745 rad
(b) 0.01745 rad
(c) 0.001745 rad
(d) 7.1745 rad
10.A body travels along the circumference of a circle of radius 2 m with a linear velocity of 6 m/s .
Then its angular velocity is
(a) 6 rad /s
(b) 3 rad /s
(c) 2 rad / s
(d) 4 rad / s
11.The location of a particle has changed. What can we say about the displacement and the distance
covered by the particle?
a) Neither can be zero
b) One may be zero
c) Both may be zero
d) One is +ve, other is –ve
12.Which of the following can be zero, when a particle is in motion for some time?
a) Displacement
b) None of these
c) Distance
d) Speed
13.A body starts from rest and travels with uniform acceleration on a straight line. If its velocity after
making a displacement of 32 m is 8 m/s, its acceleration is
(a) 1 m/s²
(b) 2 m/s²
(c) 3 m/s²
(d) 4 m/s²
14. The dimensional formula for speed is
(a) T-1
(b) LT-1
(c) L-1T-1
(d) L-1T
15.Potentiometer measures the potential difference more accurately than a voltmeter because:
(a) It has a wire of high resistance
(b) It has a wire of low resistance
(c) It does not draw current from external circuit
(d) It draws heavy current from external circuit
16.A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he
takes one hour to do so, his average velocity is
(a) 3 km/h
(b) zero
(c) 1.5 km/h
(d) 2 km/h
17.The area under acceleration time graph gives
a) change in velocity
b) change in acceleration
c) distance travelled
d) force acting
18. A ball is thrown vertically downward with a velocity of 20m/s from the top of a tower. It hits the
ground after some time with a velocity of 80m/s. The height of the tower is : (g=10m/s2) 14.
(a) 360 m
(b) 380 m
(c) 320 m
(d) 300 m
19.If s represents distance and S represents displacement, then |S|/s is.
(a) > 1
(b) < 1
(c) = 1
(d) ≤ 1
20.If the displacement of a given body is found to be directly proportional to the cube of the time
elapsed, then the magnitude of the acceleration of the body is
(a) zero
(b) constant but not zero
(c) increasing with time
(d) decreasing with time
Answers:
1.(c)
2.(c)
3.(a)
4.(c)
5.(d)
6.(d)
7.(a)
8.(a)
9.(b)
10.(b)
11.(a)
12.(a)
13.(a)
14.(b)
15.(c)
16.(b)
17.(a)
18.(d)
19.(d)
20.(c)