Question

iii. The angular momentum of system of particles is conserved,………
a. When no external force acts upon the system
b. When no external torque acts upon the system
c. When no external impulse acts upon the system
d. When axis of rotation remains the same ​

Answer 1

Answer:

B,When no external torque acts upon the system

Explanation:

dt/dL= τext,

When τext =0, dt/dl=0 ⇒ L =constant i.e L is conserved

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