Question

Calculate the voltage of a battery connected to a parallel plate capacitor

with a plate area of 2.00x10-2 m2 and a plate separation of 2.0x10-3 m if

the charge stored is 4.00x10-12 C.

Answer 1

$$V=q/C\\ =\frac{q*d}{\epsilon_0A }$$

$$V=\frac{4.00*10^{-12}*2.0*10^{-3}}{8.85*10^{-12}*2.00*10^{-2} }=4.52*10^{-2}\:\rm V$$