An Exercise in Integration

Two parallel insulting plates of area A A are put close together. Their inner surfaces are each given a uniform charge + Q +Q . Find the force needed to hold the plates together. (in Newtons)

Details: A = 300 m A=300m , Q = 0.23 C Q=0.23C , ϵ 0 = 8.854 × 1 0 12 F m 1 \epsilon_0=8.854\times10^{-12} Fm^{-1}


The answer is 9958.

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