Question $21$

$5$ pts

If $I_1=4\mathrm{.}68A,I_2=0\mathrm{.}65A,$ and $d=5\mathrm{.}43cm,$ what is the magnitude of the magnetic force on a $1\mathrm{.}66$ cm length of the bottom wire?

Enter your answer in units of micronewtons, ${10}^{-6}$ Newtons. For example, if your calculation produces a value of $1\mathrm{.}23{10}^{-7}N,$ first convert units to $1\mathrm{.}23{10}^{-1}({10}^{-6}(N))$ or $0\mathrm{.}123{10}^{-6}N,$ then enter your answer as $0\mathrm{.}123.$