阿摩線上測驗
52. Consider a parallel-plate capacitor. Each plate has area A. One plate carries a uniform surface charge density σ and the other carries a uniform surface charge density -σ. Each plate of a parallel-plate capacitor exerts a force Fon the other. Calculate the force.
(A)
(B)
(C)
(D)
(E) 
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統計： A(0), B(1), C(0), D(9), E(0) #3222819
統計： A(0), B(1), C(0), D(9), E(0) #3222819
