$A$ parallel plate capacitor has a uniform electric field $E$ in the space between the plates. If the distance between the plates is $d$ and the area of each plate is $A,$ the energy stored in the capacitor is
- A$\varepsilon_0 EAd$
- B$\frac{1}{2} \varepsilon_0 \frac{E^2}{Ad}$
- C$\frac{1}{2} \varepsilon_0 E^2 Ad$
- D$\varepsilon_0 \frac{E^2}{Ad}$
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