A) \[\frac{1}{2}{{C}^{2}}{{V}^{2}}\]
B) \[\frac{{{q}^{2}}}{4C}\]
C) \[\frac{1}{2}{{\varepsilon }_{0}}\left( \frac{v}{d} \right)\]
D) \[\frac{1}{2}{{\varepsilon }_{0}}\left( \frac{{{v}^{2}}}{{{d}^{2}}} \right)\]
Correct Answer: D
Solution :
Energy density between the plates of a parallel plate capacitor. \[Energy\text{ }density=\frac{energy}{volume}=\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}}=\frac{1}{2}{{\varepsilon }_{0}}\frac{{{V}^{2}}}{{{d}^{2}}}\]
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