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A long wire A carries a current of 10 am...

A long wire `A` carries a current of `10` amp. Another long wire `B`, which is parallel to `A` and separated by `0.1m` from `A`, carries a current of `5` amp, in the opposite direction to that in `A`. What is the magnitude and nature of the force experienced per unit length of `B`? `(mu_(0)=4pixx10^(-7)weber/amp-m)`

A

Repulsive force of `10^(-4)N//m`

B

Attractive force of `10^(-4)N//m`

C

Repulsive force of `2pix10^(-5)N//m`

D

Attractive force of `2pixx10^(-5)N//m`

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The correct Answer is:
A
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