1. When a body moves in a circle in the clockwise direction the angular displacement ∆Ѳ is taken as?

- Positive
- Negative
**correct** - Both ways
- None of these

2. S.I. unit of angular velocity is

- Degree per second
- Revolution per minute
- Radian per second
**correct** - None of these

3. The rate at a which the angular displacement is changing with time is called?

- Average angular velocity
- Angular acceleration
- None of these
- Angular velocity
**correct**

4. As the ∆t approaches to zero, the limit of ratio ∆ω/∆t becomes

- Variable angular acceleration
- Instantaneous angular acceleration instantaneous
**correct** - None of these
- Average acceleration

5. Angular displacement is a vector quantity for?

- All values of ∆Ѳ
- Very small value of ∆Ѳ
**correct** - None of these
- Small value of ∆Ѳ

6. One radian is equal to

- 58⁰
- 57.3⁰
**correct** - 57⁰
- 360⁰/π

7. The S.I. unit of angular displacement is

- Degrees
- Revolution
- Radian
**correct** - All of these

8. I revolution is equal to

- None of these
- 2π radian
- 360⁰
- Both
**correct**

9. ‘S’ is the are length and after one revolution it becomes

- 2πr
**correct** - 2 π
- None of these
- 2π/r

10. Angular displacement generally expressed in

- Revolution
- Degrees
- Radian
- All of these
**correct**

11. The rate of change of angular velocity is called

- Angular displacement
- Angular acceleration
**correct** - Instantaneous velocity
- None of these

12. Angle subtended at the center of the circle by a body is called?

- All of these
- Linear velocity
- Angular velocity
- Angular displacement
**correct**

13. *2*π radian is equal to the degrees

- None of these
- 360⁰
**correct** - 90⁰
- 180⁰

14. Radian is the unit of angular displacement which is?

- Greater than degree
**correct** - None of these
- Equal
- Less than degree

15. The direction of angular acceleration is

- Opposite to the axis of rotation
- Along the axis of rotation
**correct** - Perpendicular to the axis of rotation
- None of these

16. When a body moves in a circle in the counter clockwise direction the angular displacement ∆Ѳ is taken as?

- None of these
- Negative
- Both ways
- Positive
**correct**

17. The direction of angular displacement is determined by using

- None of these
- Head-to-tail rule
- Right angle rule
**correct** - Fleming left hand rule

18. Angular velocity is a

- Scalar quantity
- Constant quantity
- None of these
- Vector quantity
**correct**

19. What is the relation between an are length and the angle Ѳ (in radian) with the ‘r’ as its radius

- S = r Ѳ
**correct** - None of these
- Ѳ = r/S
- R = Ѳ/S

20. Angular acceleration is a

- Scalar quantity
- Vector quantity
**correct** - Variable quantity
- None of these

**Entry Test 2021 Physics Circular Motion MCQS Online Preparation Sample Paper 2 Questions with Answer**

1. The rotational analogue of Newton’s second law of motion is

- None of these
- mrα²
- mr²α
**correct** - mrα

2. The relation between linear acceleration and angular acceleration is

- a=ωr/α
- a = rωα
- a=r/ω α
- at=rα
**correct**

3. The law of conservation is important in many sport like

- Diving
- All of these
**correct** - Ice-skating
- Gymnastics

4. The axis of ration of an object will not change its orientation unless

- None of these
- Internal torque acts in one direction
- Internal torque acts
- External torque acts
**correct**

5. The linear velocity in a circle is called

- Linear velocity
- None of these
- Angular velocity
- Tangential velocity
**correct**

6. An electric fan rotating in 3 revs¯¹ is switched off. It come sot rest in 18.0 sec. Find the value of acceleration which is

- 0027 revs¯²
- – 0.167 revs¯²
**correct** - + 1.267 revs¯²
- – 0.152 revs¯²

7. The force required to bend the normally straight path of the particle into circular path is called

- Centripetal force
**correct** - Normal force
- Applied force
- Reactional force

8. The Earth’s axis of rotation is

- Not fixed
- Remains fixed in one direction
**correct** - None of these
- Remains fixed

9. The equations of angular motion only hold true when the axis of rotation is

- Fixed in some equations
- Not fixed

None of these- Fixed
**correct**

10. The moment of inertia plays the same role in angular motion as in linear motion as

- Density
- Mass
**correct** - None of these
- Weight

Question was not answered11. The units of angular acceleration is

- None of these
- Radian per second
- Radian
- Radian per minute
**correct**

12. In the relations ∆S/∆t =r ∆Ѳ/∆t. If he limit is taken as ∆t → 0 then relation takes the form

- v = r/ω
- V = rω
**correct** - a = rV
- a = rω

13. On the circumference of a circle, the magnitude V is very small and has direction

- Perpendicular to the point
- None of these
- Changes from time to time
- Along he tangent to the circle
**correct**

14. In a uniform circular motion of a particle, the direction changes but not its

- B and C
**correct** - Angular displacement
- Force towards center
- Magnitude of velocity

15. All points on a rigid body rotating about a fixed axis have

- Same angular acceleration
- Don’t have angular speed
**correct** - None of these
- Same angular displacement

16. A 10 kg car is turning around a corner at 10ms¯¹. The radius of the circular are is 10m. Find the force between the types and pavement which is

- 1.0 x 10⁴ N
**correct** - 1.0 x 10⁶ N
- 1.0 x 10² N
- None of these

17. In the relation ∆S/∆t = r ∆Ѳ/∆t. If the limit is taken as ∆t → 0 time ∆S/∆t represents

- Linear velocity
**correct** - Angular velocity
- Linear acceleration
- None of these

18. By the use of angular variable we can describe the

- Angular motion of a body
**correct** - None of these
- Linear motion of body
- Both

19. The centripetal force in terms of its angular measure is given by

- Fc = mrω²
**correct** - Fc = mr²ω
- None of these
- Fc = mr²ω²

20. The quantity mr² is known as

- Moment arm
- Moment of inertia
**correct** - None of these
- Moment of force

**Entry Test 2021 Physics Circular Motion MCQS Online Preparation Sample Paper 3 Questions with Answer**

1. If the particle is moving in a circle of radius ‘r’ with uniform angular velocity ω. The angle between r and tangential velocity is

- 0⁰
- 180⁰
- 270⁰
- 90⁰
**correct**

2. For an elliptic orbit, the satellite has speed of

- None of these
- 35,000 Kmh¯¹
- 37,000 Kmh¯¹
- 30,0000 Kmh¯¹
**correct**

3. Moment of inertia of a thin ring or hoop is

- 2/3 mr²
- 1/3 mr²
- mr²
**correct** - 5/6 mr²

4. Moment of inertia of a solid disc or cylinder is

- ½ mr²
**correct** - mr²
- ¼ mr²
- 1/3 mr²

5. Moment of inertia of thin rod is

- 1/15mL²
- 1/2mL²
- 1/12mL²
**correct** - 1/6mL²

6. The angular momentum is a vector quantity with due

- Perpendicular to the axis of rotation
- Along the axis of rotation
**correct** - At the axis of rotation
- None of these

7. The law of conservation of momentum says that the total angular momentum of the system remains constant if no external

- None of these
- Frictional force action it
- Torque acts on it
**correct** - Force acts on it

8. The angular momentum of a particle is given as

- L = p x V

None of these- L = m x p
- L = r x p
**correct**

9. Law of conservation of momentum has been verified for the

- A and C
**correct** - Submicroscopic level
- Cosmological level
- Microscopic level

10. Moment of inertia of a sphere is

- 2/5 mr²correct
- 1/3 mr²
- 4/5 mr²
- ¾ mr²

11. For a circular orbit, the satellite has speed of

- 26,000 Kmh¯¹
- 20,00 Kmh¯¹
- 25,000 Kmh¯¹
- 27,000 Kmh¯¹
**correct**

12. The orbital radius as the revolving body is revolving is

- Smaller
- Very Smaller
- Larger
**correct** - None of these

13. The spin angular momentum is the angular momentum of a

- Rotating body
- None of these
- Revolving body
- Spiming boy
**correct**

14. Moment of inertia depends on mass and also on

- r³
- r
- r²
**correct** - None of these

15. SI unit of angular momentum is

- Kgms¯¹
- Kgm³s¯¹
- Kgm²s¯²
- Kgm²s¯¹
**correct**

16. A disc roll down a hill of 10.0 m from rest without slipping. What is its speed at the bottom

- 11.3 ms¯¹
- 11.4 ms¯¹
**correct** - 10.2ms¯¹
- None of these

17. Satellites are objects that orbit around the

- Planet
- Sun
- All of these
- Earth
**correct**

18. Satellites are held in orbits by gravitational pull by Earth and are putt into orbit by

- None of these
- Initial velocity
- Escape velocity
- Rockets
**correct**

19. The mass distribution of a rigid body is

- Not uniform
**correct** - Both
- None of these
- Uniform

20. The orbital angular momentum is associated with the motion of a body

- Along a circular path
**correct** - None of these
- Rotating body
- Revolving body