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A long conducting wire carrying a curren...

A long conducting wire carrying a current I is bent at `120^@` (see figure). The magnetic field B at a point P on the right bisector of bending angle at a distance d from the bend is (`mu_0` is the permeability of free space)

A

`(3mu_0 I)/(2pi d)`

B

`(mu_0 I)/(2pi d)`

C

`(mu_0 I)/(sqrt(3) pi d)`

D

`(sqrt(3) mu_0 I)/(2pi d)`

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