An RLC series circuit, connected to a source E, is at resonance. Then:
A) the voltage across R is zero
B) the voltage across R equals the applied voltage
C) the voltage across C is zero
D) the voltage across L equals the applied voltage
E) the applied voltage and current differ in phase by 90 $\degree$

Question

Quizplus · Accepted Answer

At resonance, the impedance of the circuit is purely resistive and equal to R. Therefore, the voltage across R will be equal to the applied voltage, and the voltage across L and C will be equal and opposite, resulting in a net voltage of zero across the capacitor. The phase angle between the applied voltage and current will be 0°, indicating that they are in phase.

An RLC Series Circuit, Connected to a Source E, Is °\degree°

An RLC Series Circuit, Connected to a Source E, Is $\degree$