A charge of

A charge of $+2.0 \times 10^{-8} \mathrm{C}$ is placed on the positive plate and a charge of $-1.0 \times 10^{-8} \mathrm{C}$ on the negative plate of a parallel-plate capacitor of capacitance $1.2 \times 10^{-3} \mu \mathrm{F}$.