A current of one ampere is passed throug...

A current of one ampere is passed through a straight wire of length `2*0` metre. Find the magnetic field at a point in air at a distance 3 metre from one end of wire but lying on the axis of the wire.

A

`(mu_(0))/(2pi)`

B

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

C

`(mu_(0))/(8pi)`

D

Zero

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The correct Answer is:

D

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