Question

In a series RLC circuit, the phase difference between the voltage across the capacitor and the voltage across the inductor is?

(a) 0^0

(b) 90^0

(c) 180^0

(d) 360^0

I have been asked this question during a job interview.

This interesting question is from Voltages in a Series RLC Circuit topic in section Resonance in AC Circuits of Basic Electrical Engineering

Answer 1

Right option is (c) 180^0

Easy explanation: In a series RLC circuit, voltage across inductor lead the current by 90^0 and voltage across capacitor lag the current by 900 so, the phase difference between the voltage across the inductor and the voltage across the capacitor is 180^0.