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Q.

An electron is revolving in a circular path if angular momentum of it is L and magnetic moment of the path is M, then (q is the charge of the electron and m is the mass of the electron)

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a

L&M are in the same direction with ML=q2m

b

L&M are in opposite direction with ML=2mq

c

L&M  are in the same direction with ML=2mq

d

L&M are in opposite direction with ML=q2m

answer is D.

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Detailed Solution

ML=i×πR2MR2ω=ef×πMω;f=ω2π

M is the direction of flow of current whereas L depends on direction of rotation of  electrons. 

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