The conservation of angular momentum demands thatA. the external force on the system must be zeroB. the external torque on the system must be zeroC. Both the external force as well as the external torque must be zeroD. Neither of them must be zero

The conservation of angular momentum demands thatA. the external force

1.	The conservation of angular momentum demands thatA. the external force on the system must be zeroB. the external torque on the system must be zeroC. Both the external force as well as the external torque must be zeroD. Neither of them must be zero
Answer» Correct Answer - B From law of conservation of angular momentum, if no external torque acts on a system, then total vector sum of angular momentum of different particles of the system remains conserved. `tau_("ext") =0` then `(dL)/(dt)=0`

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The conservation of angular momentum demands thatA. the external force on the system must be zeroB. the external torque on the system must be zeroC. Both the external force as well as the external torque must be zeroD. Neither of them must be zero

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