Currents of `10A, 2A` are passed through two parallel wires `A` and `B` respectively in opposite directions. If the wire `A` is infinitely long and the length of the wire `B` is 2 metre, the force on the conductor `B`, which is situated at `10cm` distance from `A` will be

Options

A. `8xx10^(-5)`newton
B. `5xx10^(-5)` netwon
C. `8 pixx10^(-7)` newton
D. `4pixx10^(-7)` newton

Answer

1

Explanation

`F=(mu_(0))/(2pi)(i_(1)i_(2))/(r)xxl`