The plates of a parallel-plate capacitor have areas of 10, Ask an Expert

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The plates of a parallel-plate capacitor have areas of 10 cm² each and are separated by 2 cm. The capacitor is filled with a dielectric material with ε= 4ε₀, and the voltage across it is given by
V (t) = 30 cos 2π×10⁶t (V). Find the displacement current.

A coaxial capacitor of length l = 6 cm uses an insulating dielectric material with r = 9. The radii of the cylindrical conductors are 0.5 cm and 1 cm. If the voltage applied across the capacitor is

V (t) = 50 sin(120πt) (V),

what is the displacement current?

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