An ac generator emf has emf $=$m sin $($d t $/4),$ where $$m $=20\mathrm{.}0$ V and $$d $=215$ rad$/$s$.$ The current produced in a connected circuit is i$($t$)=$ I sin$($d t $3/4),$ where I $=600$ mA$.$

$($a$)$ At what time after t $=0$ does the generator emf first reach a maximum?

$($No Response$)$ s

$($b$)$ At what time after t $=0$ does the current first reach a maximum?

$($No Response$)$ s

$($c$)$ The circuit contains a single element other than the generator. Is it a capacitor, an inductor, or a resistor?

inductorcapacitor$$resistor