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Magnetic field at the centre of coil of ...

Magnetic field at the centre of coil of `n` turns, bent in the form of a square of side `2l`, carrying current `i`, is

A

`(sqrt(2)mu_(0)nI)/(pi l)`

B

`(sqrt(2)mu_(0)nI)/(2pi l)`

C

`(sqrt(2)mu_(0)nI)/(4 pi l)`

D

`(2 mu_(0)nI)/(pi l)`

Text Solution

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The correct Answer is:
A
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