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

`0`

Text Solution

Verified by Experts

The correct Answer is:

D

`B = (mu_0 i)/(2pi r)`

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