The energy stored in a parallel plate capacitor varies as the ___ of the voltage across its plates.

Square

cube

Square root

The energy stored in a parallel plate capacitor varies as the square of the voltage across its plates.

Square

Explanation:

The energy stored in a capacitor is in the form pf electrical energy.

The formula for the energy stored in a capacitor is given by

U = 1/2 CV^2

Where C is the capacitance of capacitor and V be the potential difference between the plates of capacitor.