⬛ *`Physics - Chapter: Circular Motion MCQs`* 1. *Centripetal force is directed:* a) Away from the center b) Towards the center c) Tangential to the path d) Parallel to velocity *Answer*: b) Towards the center 2. *The angle subtended at the center by an arc of length r radius is:* a) 1 radian b) 2pi radians c) 90° d) None of these *Answer*: a) 1 radian 3. *The unit of angular velocity is:* a) Radians per second b) Meters per second c) Newton-meters d) Radians *Answer*: a) Radians per second 4. *The relationship between linear velocity v, angular velocity omega, and radius r is:* a) v = r omega b) v = frac r omega c) v = frac omegar d) v = r²omega *Answer*: a) v = r omega 5. *Centripetal force is necessary for:* a) Linear motion b) Circular motion c) Oscillatory motion d) Projectile motion *Answer*: b) Circular motion 6. *The period of a particle in uniform circular motion is:* a) Time for one complete revolution b) Time for half a revolution c) Time for one radian d) None of these *Answer*: a) Time for one complete revolution 7. *Centrifugal force appears in:* a) Inertial frame b) Non-inertial frame c) Stationary frame d) None of these *Answer*: b) Non-inertial frame 8. *If the angular velocity of a rotating body is doubled, the centripetal force becomes:* a) Half b) Double c) Four times d) Eight times *Answer*: c) Four times 9. *The SI unit of centripetal force is:* a) Joule b) Newton c) Radian d) Watt *Answer*: b) Newton 10. *The direction of centripetal acceleration is:* a) Towards the center b) Away from the center c) Tangential to the path d) Perpendicular to velocity *Answer*: a) Towards the center 11. *The time period of a body in circular motion is given by:* a) T = frac 2pi omega b) T = omega r c) T = frac vr d) T = frac pi omega *Answer*: a) T = frac 2pi omega 12. *The centripetal force for a mass m, moving at velocity v in a circle of radius r is:* a) F = mv²r b) F = mvr² c) F = frac{mv²r d) F = fracmrv² *Answer*: c) F = fracmv²r 13. *The centripetal acceleration is proportional to:* a) v b) v² c) v³ d) 1/v **Answer**: b) v² 14. *In a conical pendulum, the angle of the string with the vertical is dependent on:* a) Mass of the bob b) Velocity of the bob c) Length of the string d) Both b and c *Answer*: d) Both b and c 15. *Angular acceleration is defined as:* a) Change in angular velocity per unit time b) Change in linear velocity per unit time c) Product of angular velocity and time d) None of these *Answer*: a) Change in angular velocity per unit time 16. *Which of the following is NOT a characteristic of uniform circular motion?* a) Constant speed b) Constant velocity c) Centripetal force d) Circular path *Answer*: b) Constant velocity 17. *If the radius of the circular path is halved, the centripetal force becomes:* a) Half b) Double c) Four times d) None of these *Answer*: c) Four 18. *The angular displacement is measured in:* a) Degrees b) Radians c) Both a and b d) None of these *Answer* c) Both a and b 19. *The relation between time period T and frequency f is:* a) T = f b) T = frac1f c) T = 2pi f d) T = 2f *Answer*: b) T = frac1f 20. *Tangential velocity of a body in circular motion depends on:* a) Radius only b) Angular velocity only c) Both radius and angular velocity d) Mass *Answer*: c) Both radius and angular velocity