A conductor of length $2\;m$ carrying current of $2\;A$ is held parallel to an infinitely long conductor carrying current of $10\;A$ at a distance of $100\;mm$ . Find the force on small conductor .

Question

$\begin{array}{1 1} 8 \times 10^5 \;N \\ 8 \times 10^4\;N \\ 8 \times 10^{-5}\;N \\ 8 \times 10^{-4}\;N \end{array} $