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An electron moving in a circular orbit o...

An electron moving in a circular orbit of radius makes n rotations per second. The magnetic field produced at the centre has magnitude :

A

`(mu_(0) n^(2) e)/(2r)`

B

`(mu_(0) n e)/(2r)`

C

`(mu_(0) n e)/(2pi r)`

D

zero

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The correct Answer is:
B
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