A sinusoidally oscillating current I$($t$)$ with an amplitude of

$9\mathrm{.}55$ A and a frequency of $775$ cycles per second is carried by

a long, straight wire. A rectangular loop of copper wire with

dimensions b $=72\mathrm{.}2$ cm by c $=32\mathrm{.}5$ cm is located

a $=80\mathrm{.}2$ cm from the straight wire, and is coplanar with it$.$