Questions
Two particles each of mass m and charge q are attached to two ends of a light rod of length 2l. The rod is rotated at a constant angular speed about a perpendicular axis passing through its centre. The ratio of the magnitudes of the magnetic moment of the system to its angular momentum will be
detailed solution
Correct option is B
The magnetic moment M is given byM=iA=2qω2ππl2…The angular momentum I is given byL=Iω=2ml2ω∴ML=q2mTalk to our academic expert!
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A conducting solid sphere having uniform charge Q on it has radius R. It is rotating with an angular velocity If a uniform magnetic field B is present perpendicular to axis of rotation then the torque on sphere will be
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