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A metallic wire is folded to form a squa...

A metallic wire is folded to form a square loop a side `'a'`. It carries a current `'I'` and is kept perpendicular to a uniform magnetic field. If the shape of the loop is changed from square to a circle without changing the length of the wire and current, the amount of work 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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