Two long and parallel straight wires A and B carrying currents of $8.0\;A$ and $5.0 \;A$ same direction are separated by a distance of $4.0\;cm$ . Estimate the force on a $10\;cm$ section of wire A?

Question

$\begin{array}{1 1} 2 \times 10^{-5}\;N \\ 2 \times 10^{5}\;N \\ 2 \times 10^{-4}\;N \\ 7.1 \times 10^{-2}\;N \end{array} $