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Questions  

Two particles, each of mass m and charge q, are attached to the two ends of a light rigid rod of length 2R. The rod is rotated at constant angular speed about a perpendicular axis passing through its centre. The ratio of the magnitudes of the magnetic moment of the system and its angular momentum about the centre of the rod is

a
q/2m
b
q/m
c
2q/m
d
q/πm

detailed solution

Correct option is A

M=2qTA=2qω2ππR2=qωR2L=2mR2ωML=q2m

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