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WBJEE 2013 Physics Solved Paper
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© examsnet.com
Question : 57
Total: 60
An electron of charge e and mass m is moving in circular path of radius r with a uniform angular speed ω. Then whichof the following statements are correct ?
The equivalent current flowing in the circular path is proportional to
r
2
The magnetic moment due to circular current loop is independent of m
The magnetic moment due to circular current loop is equal to 2e/m time the angular momentum of the electron
The angular momentum of the particle is proportional to the areal velocity of electron
Validate
Solution:
Magnetic moment
µ
=
I
A
=
e
v
2
π
r
π
r
2
=
e
v
r
2
Angular momentum = 2m
d
A
d
t
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