What is the change in the angular momentum of a system as per the Law of Conservation of Angular momentum, if the total external torque acting is zero?

A Remains constant
B Becomes zero
C Increases exponentially
D None of the above

Correct Answer: Remains constant

If net external torque on a system is zero, then the angular momentum of the system can not change. If net external torque on a system is zero, then the angular momentum of the system remains same.
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