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Find the magnetic field at a point P on ...

Find the magnetic field at a point P on the perpendicular bisector of the current carrying conductor :-

A

`(mu_(0)i)/(2sqrt2pil)`

B

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

C

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

D

zero

Text Solution

Verified by Experts

The correct Answer is:
A
Here,
`cos theta_(1)=cos theta_(2)=(l)/(sqrt2l)=(1)/(sqrt2`
Then.
`B=(mu_(0)i)/(4pil)(cos theta_(1)+cos theta_(2))`

`=(mu_(0)i)/(4pil)(1)/(sqrt2+(1)/(sqrt2))=(mu_(0)i)/(2sqrt2pil)"(in ward)"`
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