$A$ parallel plate capacitor has a uniform electric field $E \ (V/m)$ in the space between the plates. If the distance between the plates is $d \ (m)$ and the area of each plate is $A \ (m^2)$,then the energy (joules) stored in the capacitor is:
- A$E^2 Ad / \epsilon_0$
- B$\frac{1}{2} \epsilon_0 E^2$
- C$\epsilon_0 EAd$
- D$\frac{1}{2} \epsilon_0 E^2 Ad$
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