A) \[\frac{2{{Q}^{2}}}{{{\varepsilon }_{0}}A}\]
B) \[\frac{{{Q}^{2}}}{{{\varepsilon }_{0}}A}\]
C) \[\frac{{{Q}^{2}}}{2{{\varepsilon }_{0}}A}\]
D) Zero
Correct Answer: C
Solution :
Force on one plate due to another is \[F=QE=Q\times \frac{\sigma }{2{{\varepsilon }_{0}}}\] \[=Q\left[ \frac{Q}{2A{{\varepsilon }_{0}}} \right]\] \[=\frac{{{Q}^{2}}}{2A{{\varepsilon }_{0}}}\]
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