# 11 class physics MCQs with answers

## 11 Class Physics MCQs With Answers let’s get started

1. The magnitude of angular momentum is.
A. rFsinθ
B. Fdcosθ
C. rpsinθ
D. Zero
2. For circular motion, the magnitude of angular momentum is.
A. RP
B. Unity
C. Zero
D. None of these
3. The direction of angular momentum is perpendicular to the plane of r and p can be determined by.
A. Left-hand rule
B. Right-hand rule
C. Pythagoras
D. Both a and b
4. The S.I. unit of angular momentum is.
A. J/S
B. J.S
C. N.M
D. N.S
5. If linear momentum is directed towards the axis of rotation the angular momentum is given by.
A. Unity
B. Zero
C. 4
D. -1
6. The rate of change of angular momentum is equal to.
A. Force
B. Work
C. Torque
D. Impulse
7. Physics quantities that play the same role in angular motion as mass does in linear motion is called.
A. Torque
B. Centre of gravity
C. Centre of mass
D. Moment of inertia
8. The rate of change of linear momentum is equal to.
A. Force
B. Work
C. Torque
D. Impulse
9. The moment of momentum is called.
A. Couple
B. Torque
C. Impulse
D. Angular momentum
10. Which of the following is equivalent to the moment of inertia in Linear motion?
A. Mass
B. Angular momentum
C. Force
D. None of these
11. The planetary system in the solar system describes.
A. Conservation of K.E
B. Conservation of Linear Momentum
C. Conservation of angular momentum
D. None of these
Correct Answer: Conservation of angular momentum
12. If a person standing on a rotating disc stretches his hands, the angular speed will be.
A. Increase
B. Decrease
C. Remains same
D. None of these
13. The angular momentum of a system of particles changes When.
A. Force acts on a body
B. Torque acts on a body
C. Direction of velocity changes
D. None of these
Correct Answer: Torque acts on a body
14. Angular momentum has changed from 2 units to 6 units in 5s, what is torque applied?
A. 0.8
B. 1.2
C. 1.8
D. 2
15. The first condition of equilibrium is also called __ equilibrium.
A. Static
B. Dynamic
C. Rotational
D. Translational
16. The second condition of equilibrium is also called __ equilibrium.
A. Angular
B. Dynamic
C. Rotational
D. Translational
17. A_______ produces purely a rotational motion.
A. Couple
B. Torque
C. Moment of inertia
D. None these
18. If the rotational inertia of an isolated system decreases _ increases. A. Angular acceleration
B. Angular momentum
C. Angular velocity
D. Torque