In an inductor with L $=350.$ mH the current rises from zero up to a maximum of I$0=2\mathrm{.}00$ A in $$t $=3\mathrm{.}00$ ms$.$

$($a$)$ Find the magnitude of the induced emf.

$189$ V$67\mathrm{.}7$ V$233$ V$299$ V$208$ V$121$ V$170.$ V$579$ V$261$ V

$($b$)$ At the maximum current I$0=2\mathrm{.}00$ A$,$ how much energy is stored in the inductor?

$315$ mJ$1650$ mJ$2630$ mJ$651$ mJ$616$ mJ$700.$ mJ$245$ mJ$819$ mJ$2210$ mJ