Question

Under normal conditions capacitors have _________

(a) Displacement current

(b) Conduction current

(c) Both conduction and displacement current

(d) Neither conduction nor displacement current

I had been asked this question in homework.

My enquiry is from Leakage and Conduction Currents in Capacitors topic in division Capacitance and Capacitors of Basic Electrical Engineering

Answer 1

Correct choice is (a) Displacement current

To elaborate: Under normal conditions capacitors contain an insulating material called dielectric sandwiched between the plates of the capacitor. Since insulators can carry only an electric field but not moving carriers, therefore normally a capacitor has displacement current and not conduction current.