A parallel plate air capacitor of capacity C and distance of separation between plates d, with constant voltage V applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is:
Options

Question

A parallel plate air capacitor of capacity C and distance of separation between plates d, with constant voltage V applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is:

Options

G1 Physics · Accepted Answer

Step 1: Electrostatic energy at fixed voltage is U = ½CV² = ½(ε₀A/d)V². Step 2: Attractive force magnitude equals ½ε₀A(V/d)². Step 3: Substitute C = ε₀A/d to get F = CV²/(2d).