A series LCR AC circuit is at resonance. It contains a resistor of 16 $\Omega$, a capacitor of 0.35 $\mu$F, and an inductor of 90 mH. If an effective (rms) voltage of 150 V is applied, what is the effective (rms) current when the circuit is in resonance?
A) 9.4 A
B) 3.3 A
C) 5.0 A
D) 16.1 A

Question

Quizplus · Accepted Answer

At resonance, the impedance of the circuit is purely resistive and equals the resistance. Therefore, the effective current is given by Ohm's Law: I = V/R = 150V / 16Ω = 9.375 A, which rounds to 9.4 A.

A Series LCR AC Circuit Is at Resonance Ω\OmegaΩ , a Capacitor of 0

A Series LCR AC Circuit Is at Resonance $\Omega$ , a Capacitor of 0