Problem

In an

L

C

circuit,

L = 0.75 \text{ H}

and

C = 18 \mu\text{F}

, (a) At the instant when the current in the inductor is changing at a rate of

3.40 \text{ A/s}

, what is the charge on the capacitor? (b) When the charge on the capacitor is

4.2 \times 10^{-4} \text{ C}

, what is the induced emf in the inductor?