Each plate of a parallel-plate capacitor is a square of side 4.57cm, and the plates are separated by 0.453 mm. The capacitor is charged and stores 7.21 nJ of energy. Determine the electric field strength inside the capacitor.
a) 16.25 N/C
b) 35.67 N/C
c) 24.67 N/C
d) 11.53 N/C
