Q. The angular momentum of a system of particles is conserved
A) When no external force acts upon the system
B) When no external torque acts on the system
C) When no external impulse acts upon the system
D) When axis of rotation remains same
Explanation
The correct answer is Option B: When no external torque acts on the system.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.