A single$-$turn rectangular coil has a resistance of $20.$ The magnetic eld at all points inside the coil varies as a function given as B $=$ B$0$e t$,$ where B$0=0\mathrm{.}25$T and $=200$Hz$.$ What is the induced voltage and direction of current ow in the coil at $($a$)$ t$=0\mathrm{.}001$s$,($b$)0\mathrm{.}002$ s$,($c$)2\mathrm{.}0$ s$?$