Free Test Angular momentum – NEET

Q1: What is the SI unit of angular momentum?

A. kg m²/s B. kg m/s² C. N m² D. J s

Q2: Angular momentum of a particle is a vector quantity directed along?

A. Radial direction B. Velocity vector C. Angular velocity vector D. Tangential direction

Q3: Which of the following is conserved in the absence of external torque?

A. Linear momentum B. Angular velocity C. Angular momentum D. Rotational energy

Q4: Angular momentum L of a rotating body is given by?

A. L = mv B. L = Iω C. L = r × F D. L = p × v

Q5: The angular momentum of a particle moving in a straight line is?

A. Zero always B. Maximum always C. Zero about the origin D. Non-zero about a point not on the line

Q6: Which of the following has the same unit as angular momentum?

A. Work B. Impulse C. Torque D. Planck's constant

Q7: The rate of change of angular momentum is equal to?

A. Force B. Torque C. Linear momentum D. Angular velocity

Q8: A rotating disc has constant angular momentum. Which quantity is also constant?

A. Angular acceleration B. Kinetic energy C. Torque D. Angular velocity

Q9: Which law is associated with conservation of angular momentum?

A. Newton's second law B. Work-energy theorem C. Noether’s theorem D. Hooke’s law

Q10: If moment of inertia increases and angular momentum is conserved, then angular velocity?

A. Increases B. Decreases C. Remains same D. Becomes zero

Q11: A figure skater pulls in her arms during a spin. What happens to her angular speed?

A. Increases B. Decreases C. Remains constant D. Stops

Q12: Which expression represents angular momentum in vector form?

A. r × v B. p × v C. r × p D. F × r

Q13: Angular momentum of a body rotating in a circle of radius r with constant speed v is?

A. mvr B. mv²r C. mr²v D. mv/r

Q14: The dimensional formula of angular momentum is?

A. ML²T⁻¹ B. MLT⁻² C. ML²T⁻² D. MLT

Q15: The moment of inertia of a disc is doubled, and angular momentum is constant. The angular velocity becomes?

A. Half B. Double C. Same D. Zero

Q16: A particle of mass m moves with velocity v at a distance r from a point. Its angular momentum is?

A. mv/r B. mvr C. mr/v D. mv²

Q17: In planetary motion, angular momentum of a planet is?

A. Constant B. Increasing C. Decreasing D. Zero

Q18: A child stands on a rotating platform. When the child stretches arms, the angular velocity?

A. Increases B. Decreases C. Becomes zero D. Remains unchanged

Q19: Which is a scalar quantity?

A. Angular momentum B. Moment of inertia C. Torque D. Angular displacement

Q20: For a rigid body, torque is the time derivative of?

A. Angular velocity B. Moment of inertia C. Angular momentum D. Angular displacement

Quiz for Angular momentum