Download Aptitude Crack
img not found img not found

RLC Circuits and Resonance - Technical MCQs

Q1:

At any resonant frequency, what net voltage is measured across the two series reactive components?

A Applied voltage

B Reactive voltage

C Zero voltage

D VL + VC voltage

ANS:C - Zero voltage

Inductive reactance magnitude XL increases as frequency increases while capacitive reactance magnitude XC decreases with the increase in frequency. At one particular frequency, these two reactances are equal in magnitude but opposite in sign; that frequency is called the resonant frequency f0 for the given circuit.

Hence, at resonance:

X L = X C means net voltage is zero.