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A part of a long wire carrying a current...

A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is :

A

`(mu_(0)i)/(4r)`

B

`(mu_(0)i)/(2r)`

C

`(mu_(0)i)/(2pir)(pi+1)`

D

`(mu_(0)i)/(2pir)(pi-q)`

Text Solution

Verified by Experts

The correct Answer is:
C
`B_(0)=(mu_(0)i)/(2r)+(mu_(0)i)/(2pir)`
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