Answer
5.78 V
Work Step by Step
Assume that the plates are large enough that the electric field is uniform. Use equation 17–4b to find the magnitude of the voltage.
$$|E|=\frac{V_{ba}}{d}$$
$$V_{ba}=Ed=(525\frac{V}{m})(11.0\times10^{-3}m)=5.78V$$