MDCAT XI Physics Rotational And Circular motion Online Test-2

379

Created on June 17, 2025 By

📚 Test Details

Subject: Physics
Class: 1st year / XI
Chapter Name: Rotational and Circular Motion
Test: 2
Book: Sindh Textbook
Total No. Of MCQs: 50 MCQs
Time Allowed: 50 Minutes

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Price: Free

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1 / 50

1. If all A B and C points complete one roration after 2sec,which one has more angular momentum

a) Point A

b) Point B

c) Point C

d) All Have same angular momentum

2 / 50

2. If angular frequency and radius both are doubled,then centripetal acceleration will become

a) Halved

b) Double

c) 4 times

d) 8 times

3 / 50

3. Torque is analogue to_______in linear motion

a) Force

b) Couple

c) Momentum

d) Both a and b

e) None of these

4 / 50

4. Tangential velocity and angular acceleration are

a) Always parallel to each other

b) Always perpendicular to eachother

c) Parallel or perpendicular to each other depending on position of body

d) Cant be determined

5 / 50

5. Moment of inertia of hollow cylinder is

a) 1/2 MR²

b) 1/2 M(a² +b²)

c) 3/2 MR²

d) 2/5MR²

6 / 50

6. Direction of tangential acceleration is

a) Parallel to tangential velocity

b) Anti Parallel to tangential velocity

c) Either Parallel or Anti Parallel to tangential velocity

d) Cant be determined

7 / 50

7. When a body rotates clockwise ,direction of angular velocity is

a) Along tangential velocity

b) Along centripetal acceleration

c) Inward to plane

d) Outward to plane

e) Cant be determined

8 / 50

8. Moment of inertia is measurement of body to resist

a) Angular velocity

b) Angular acceleration

c) Angular momentum

d) None of these

9 / 50

9. Two cylinders of equal mass,one is hollow cylinder and other is solid cylinder,then

a) Hollow cylinder has more moment of inertia than solid cylinder

b) Solid cylinder has more moment of inertia than hollow cylinder

c) Both have same moment of inertia

d) Cant be determined

10 / 50

10. When a body is rotating around its own axis,then all points on body have

a) Same angular acceleration

b) Same angular velocity

c) Same angular momentum

d) Both b and c

e) All of these

11 / 50

11. Time period required to stop a body rotationg at 6πrad/sec and decelerating at rate of 2π rad/sec2

a) 2sec

b) 3sec

c) 6sec

d) 12sec

12 / 50

12. Which of the following is always uniform when body is rotationg uniformly around its own axis

a) Angular velocity

b) Angular acceleration

c) momentum

d) Linear velocity

e) Both a and b

13 / 50

13. If a wheel complete one rotations around its own axis in 2 sec,what is angular speed of wheel

a) 1 rad/sec

b) 2 rad/sec

c) 1π rad/sec

d) 2π rad/sec

14 / 50

14. Which of the following is not acting in uniform circular motion

a) Tangential acceleration

b) Radial acceleration

c) Tangential velocity

d) All of these

15 / 50

15. If body is rotating with constant angular velocity,then acceleration produced in body is

a) Tangential

b) Angular

c) Radial

d) No acceleration is produced

16 / 50

16. A solid cylinder of mass 1kg and radius 2m what is moment of inertia of cylinder

a) 1kg.m2

b) 2kg.m2

c) 3kg.m2

d) 4kg.m2

17 / 50

17. Rate of change of angular momemtum called

a) Impulse

b) Torque

c) Force

d) Both a and b

e) None of these

18 / 50

18. When arc of the circle is equal to radius,then angular dispalcement is

a) 1radian

b) 1degree

c) 1revolution

d) Both a and b

e) All of these

19 / 50

19. Ratio of angular speed of minute hand to hour hand is

a) 720:1

b) 1:720

c) 1:12

d) 12:1

20 / 50

20. 1rpm is equal to

a) 2π/1 rad/sec

b) 1/2π rad/sec

c) 2π/60 rad/sec

d) 60/2π rad/sec

21 / 50

21. Opening and closing of door about its axis works on principle of

a) Force

b) Torque

c) Angular momentum

d) None of these

22 / 50

22. Moment of inertia is independent of

a) Mass

b) Radius

c) Mass distribution

d) None of these

23 / 50

23. Angular displacement covered by body during one complete rotation is

a) 1radian

b) 57.6degree

c) 360 revolutions

d) None of these

24 / 50

24. Angular acceleration leads radius by

a) 0degree

b) 90degree

c) 120degree

d) 180degree

25 / 50

25. Which of the are always parallel To each other

a) Angular velocity and angular acceleration

b) Impulse and angular momentum

c) Impulse and tangential acceleration

d) All of these

26 / 50

26. Orbital velocity is independent of

a) Mass of satellite

b) Mass of central body

c) Distance between satellite and central body

d) None of these

27 / 50

27. Which quantity remain constant when body rotates around a circle with constant angular velocity

a) Kinetic energy

b) Angular momentum

c) Momentum

d) Both a and b

e) None of these

28 / 50

28. Frequency of a particle performing circular motion increase from 2rad/sec to 10rad/sec in 4sec

What is angular acceleration of that body?

a) 0rad/sec2

b) 2rad/sec2

c) 4rad/sec2

d) 8rad/sec2

29 / 50

29. Torque required to change momentum from 10kg.m2

Sec to 30kg.m2/sec in 2 sec is

a) 10kg.m2/sec2

b) 30 kg.m2/sec2

c) 20 kg.m2/sec2

d) 50 kg.m2/sec2

30 / 50

30. Centripetal force is

a) Deflecting force

b) Attractive force

c) Repulsive force

d) Both a and b

31 / 50

31. Radial acceleration is another name used for

a) Angular acceleration

b) Centripetal acceleration

c) Tangential acceleration

d) Both a and b

32 / 50

32. A ball performing circular motion around a circle of radius 2m,with constant angular frequency of 20rad/sec,what is centripetal l acceleration of body

a) 100 m/s2

b) 200 m/s2

c) 400 m/s2

d) 800 m/s2

33 / 50

33. Which of the following is smaller unit of angular velocity

a) Rad/min

b) Degree/min

c) Rev/min

d) Cant be determined

34 / 50

34. Which of the two are antiparallel to each other

a) Centripetal and centrifugal forces

b) Radius and centripetal force

c) Radius and centrifugal force

d) Both a and b

e) Both a and c

35 / 50

35. If a body covers 10 revolutions per second,what is angular frequency of that body

a) 1rad/sec

b) 10rad/sec

c) 10π rad/sec

d) 20πrad/sec

36 / 50

36. Angular velocity is as same as

a) Linear velocity

b) Linear frequency

c) Angular frequency

d) None of these

37 / 50

37. Which one is best example of inelastic momentum

a) Collision between bodies of unequal masses

b) Collision between bodies of unequal sizes

c) Collision in which bodies attach toghther after collision

d) All of these

38 / 50

38. A body is rotating around a circle with constant angular frequency,if radius of circle in increase,what will happen to linear velocity

a) it will increase

b) it will decrease

c) it may increase or remain same depending on location of point

d) cant be determined

39 / 50

39. If kinetic energy of a rotating body around a circle of 5m is 10j,what is centripetal force of body?

a) 4N

b) 20N

c) 5N

d) 50N

40 / 50

40. Direction of Torque is

a) Perpendicular to r

b) Perpendicular to f

c) Perpendicular to plane of r and f

d) Torque has no direction

41 / 50

41. If a block is rotating around a circle of radius r,which point on block has maximum angular velocity

a) Point A

b) Point B

c) Point C

d) All Have same angular velocity

42 / 50

42. A ball performing circular motion around a circle of radius 2m,with constant angular frequency of 10rad/sec,what is tangential acceleration of body

a) 100m/s2

b) 200m/s2

c) 400m/s2

d) None of these

43 / 50

43. Radius is directed

a) Towards centre

b) Away from centre

c) Radius has no direction

d) Cant be determined

44 / 50

44. In inelastic collision,

a) Change is K.E before and after collision is zero

b) Change in mometum before and after collision is zero

c) Change in KE and momentum is zero

d) None of these

45 / 50

45. Ratio of angular speed of minute hand of clock yo angular speed of spin motion of earth around its own axis is

a) 1:12

b) 12:1

c) 1:24

d) 24:1

46 / 50

46. A force of 10N acts through axis of a rotating body along a circle of radius of 2m,how much torque acts on body

a) 10N.m

b) 20N.m

c) 30N.m

d) None of these

47 / 50

47. A body start is at rest,it rotating at at an acceleration of of 10rad/sec2 if it covers 45rad,what is the final angular velocity of body

a) 2rad/sec

b) 30rad/sec

c) 16rad/sec

d) 400rad/sec

48 / 50

48. Angular momentum of a rotating of body is constant when no external_________acts on body

a) Force

b) Torque

c) Both a and b

d) None of these

49 / 50

49. A wheel rotates with constant angular acceleration of 2rad/sec2 ,if intitial velocity is 10rad/sec,how much angular dispalcemet covered by wheel after 1sec

a) 10rad

b) 11rad

c) 11.5rad

d) 12rad

50 / 50

50. Angular dispalcement is:

a) Unit less and dimensionless

b) Dimensionless but not unit less

c) Unit less but not dimensionless

d) Neither unit less nor dimensionless

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MDCAT XI Physics Rotational And Circular motion Online Test-2

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