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Two identical wires A and B , each of le...

Two identical wires `A and B` , each of length 'l', carry the same current `I`. Wire A is bent into a circle of radius `R and wire B` is bent to form a square of side 'a' . If ` B_(A) and B_(B)` are the values of magnetic field at the centres of the circle and square respectively , then the ratio `(B_(A))/(B_(B))` is :

A

`(pi^(2))/(16)`

B

`(pi^(2))/(8sqrt2)`

C

`(pi^(2))/(8)`

D

`(pi^(2))/(16sqrt2)`

Text Solution

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The correct Answer is:
B
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