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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 magnitude of the resultant magnetic inuduction in tesla at a point `2.0 cm` away form the wire is

A

`10^(-4)`

B

`3 xx 10^(-4)`

C

`5 xx 10^(-4)`

D

`6 xx 10^(-4)`

Text Solution

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The correct Answer is:
B
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TARGET PUBLICATION-MAGNETIC EFFECT OF ELECTRIC CURRENT -Competitive Thinking Introduction
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