Q.

An electron moves with a constant speed v along a circle of radius r. Its magnetic moment will be (e is the electron’s charge)

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a

evr

b

12evr

c

πr2ev

d

2πrev

answer is B.

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Detailed Solution

M=iπr2=ev2πr×πr2⇒M=12evr
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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An electron moves with a constant speed v along a circle of radius r. Its magnetic moment will be (e is the electron’s charge)