A 120-V rms voltage at 1000 Hz is applied to a series LRC circuit with an equal value of inductive and capacitive reactance and a 200-Ω resistance. What is the impedance of this circuit?
A)100 Ω
B)0 Ω
C)240 Ω
D)120 Ω
E)200 Ω

Question

Quizplus · Accepted Answer

In a series LRC circuit with equal inductive and capacitive reactance, the reactances cancel each other out, leaving only the resistance as the impedance. Therefore, the impedance is equal to the resistance, which is 200 Ω.

A 120-V Rms Voltage at 1000 Hz Is Applied to a Series