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A mentallic wire is folded to from a squ...

A mentallic wire is folded to from a square loop of a . It crries a cureent i and is kept perpendicular to unifrom magnetic field . If the shape of the loop changed from squre to a circle without changing length of the wire and current, the amount of wire done in doing so is

A

`iBa^(2)(pi+2)`

B

`iBa^(2_(pi-2)`

C

`iBa^(2)(4//pi+1)`

D

`iBa^(2)(1-(4)/(pi))`

Text Solution

Verified by Experts

The correct Answer is:
D
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