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Figure shows a straight wire of length l...

Figure shows a straight wire of length l carrying a current i. Find the magnitude of magnetic field produced by the current at point P.

A

`(sqrt2 mu_(0) i)/(pi l)`

B

`(mu_(0)i)/(4pi l)`

C

`(sqrt2 mu_(0) i)/(8 pi l)`

D

`(mu_(0) i)/(2 sqrt2 pi l)`

Text Solution

Verified by Experts

The correct Answer is:
C
`B = (mu_(0))/(4pi) (i)/(R ) (sin theta_(1) + sin theta_(2)) , theta_(1)= 0 , theta_(2) = 45^(@)`
`=(mu_(0))/(4pi) (i)/(l) (1)/(sqrt2) = (sqrt2 mu_(0)i)/(8 pi l)`
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