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A rectangular loop of metallic wire is o...

A rectangular loop of metallic wire is of length a and breadth b and carries a current i. The magnetic field at the centre of the loop is

A

`( mu_(0) i )/( 4pi ) ( 8 sqrt( a^(2) + b^(2)))/( ab ) `

B

`( mu_(0) i )/( 4pi ) ( 4 sqrt( a^(2) + b^(2)))/( ab ) `

C

`( mu_(0) i )/( 4pi ) ( 2 sqrt( a^(2) + b^(2)))/( ab ) `

D

`( mu_(0) i )/( 4pi ) ( sqrt( a^(2) + b^(2)))/( ab ) `

Text Solution

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The correct Answer is:
A
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