When a 4- $\mu \mathrm { F }$ Capacitor Has a Potential Drop Of

Multiple Choice

When a 4- $\mu \mathrm { F }$ capacitor has a potential drop of $20 \mathrm {~V}$ across its plates, how much electric potential energy is stored in this capacitor?

A) $0.8 \mu \mathrm { J }$
B) $80 \mu \mathrm { J }$
C) $8000 \mu \mathrm { J }$
D) $800 \mu \mathrm { J }$
E) $8 \mu \mathrm { J }$