Question

The current in the pure capacitor?

(a) lags behind the voltage by 90⁰

(b) is in phase with the voltage

(c) lags behind the voltage by 45⁰

(d) leads the voltage by 90⁰

The question was posed to me in an interview for job.

This interesting question is from Phase Relation in a Pure Resistor topic in portion Introduction to Alternating Currents and Voltages of Network Theory

Answer 1

Correct answer is (d) leads the voltage by 90⁰

Best explanation: In a capacitor, there exists a phase difference between current and voltage. The current in pure capacitor leads the voltage by 90⁰.