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A current of 1 ampere is passed through ...

A current of 1 ampere is passed through a straight wire of length 2.0 meters. What value of magnetic field at a point in air at a distance of 3 meters from either end of wire and on the axis of wire ?

A

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

B

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

C

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

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D
`B=(mu_(0)I)/(2piy)[sintheta_(1)+sintheta_(2)]`
For a given situation `theta_(1)=theta_(2)=0" "thereforeB=0`
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