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A conducting circular loop of radius r c...

A conducting circular loop of radius r carries a constant current I. It is placed in a uniform magnetic field `vec(B)` such that `vec(B)` is perpendicular to the plane of the loop. The magnetic force acting on the loop is

A

Ir `B_(0)`

B

`2 pi r (B_(0))`

C

zero

D

`pi Ir B_(0)`

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The correct Answer is:
C
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