In an RLC series circuit,if the AC frequency is decreased to a very small value,what value does the phase angle between the current and voltage approach?
A)90°
B)0°
C)-90°
D)45°

Question

Quizplus · Accepted Answer

At very small values of AC frequency, the impedance of the inductor becomes very high while the impedance of the capacitor becomes very low. Hence, the circuit becomes predominantly capacitive. In a purely capacitive circuit, the phase angle between the voltage and current is -90°. Therefore, as the AC frequency decreases, the phase angle between the current and voltage in a RLC series circuit approaches -90° (or 270°).

In an RLC Series Circuit,if the AC Frequency Is Decreased