Question

A series RLC circuit has a resonant frequency of 550 Hz. The maximum voltage across C is likely to occur at a frequency of ___________

(a) 1000 Hz

(b) 2000 Hz

(c) 1025 Hz

(d) 500 Hz

I had been asked this question at a job interview.

My question is from Advanced Problems on Network Theory topic in portion Network Theory and Complex Circuit Diagram of Network Theory

Answer 1

Correct option is (d) 500 Hz

For explanation I would say: We know that, maximum voltage across capacitance occurs at a frequency slightly less than resonant frequency.

Here, given that resonant frequency = 550 Hz.

So, out of the given options 500 is the lowest nearest integer to 550.

Hence, 975 Hz.