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(24-50) (a) Show that each plate of a parallel-plate capacitor exerts a force F=Q^2/2ε_0A on the oth
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(24-50) (a) Show that each plate of a parallel-plate capacitor exerts a force F=Q^2/2ε_0A on the other, by calculating dW/dx where dW is the work needed to increase the separation by dx. (b) Why does using F=QE, with E being the electric field between the plates, give the wrong answer?
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