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A long straight wire carrying current of `30 A` is placed in an external unifrom magnetic field of induction `4xx10^(4) T`. The magnetic field is acting parallel to the direction of current. The maggnetic of the resultant magnetic inuduction in tesla at a point `2.0 cm` away form the wire is

A

`10^(-4)`

B

`3xx10^(-4)`

C

`5xx10^(-4)`

D

`6xx10^(-4)`

Text Solution

Verified by Experts

The correct Answer is:
3
`B=sqrt(B_(1)^(2)+B_(2)^(2))`
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