A) \[\frac{{{q}^{2}}}{2{{\varepsilon }_{0}}{{A}^{2}}}\]
B) \[\frac{q}{2{{\varepsilon }_{0}}{{A}^{2}}}\]
C) \[\frac{{{q}^{2}}}{2{{\varepsilon }_{0}}A}\]
D) None of the above
Correct Answer: A
Solution :
Energy density \[=\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}}=\frac{1}{2}{{\varepsilon }_{0}}{{\left( \frac{\sigma }{{{\varepsilon }_{0}}} \right)}^{2}}=\frac{{{\sigma }^{2}}}{2{{\varepsilon }_{0}}}=\frac{{{q}^{2}}}{2{{\varepsilon }_{0}}{{A}^{2}}}\]
You need to login to perform this action.
You will be redirected in
3 sec
