JEE Main Physics question

Physics Systems of Particles and Rotational Motion JEE Main

The angular momentum of a system of particles is NOT conserved

(A)When a net external force acts upon the system
(B)When a net external torque is acting upon the systemCorrect
(C)When a net external impulse is acting upon the system
(D)None of these

Answer: (B)

Solution

Angular momentum fails to be conserved precisely when a net external torque acts.

Question ID VK-159055