In an RLC series circuit, the source voltage is leading the current at a given frequency f.If f is lowered slightly, then the circuit impedance will:
A)increase
B)decrease
C)remain the same
D)cannot answer without knowing the amplitude of the source voltage
E)cannot answer without knowing whether the phase angle is larger or smaller than 45 °

Question

Quizplus · Accepted Answer

In an RLC series circuit, impedance (Z) is given by Z = √(R^2 + (Xl - Xc)^2). As the frequency is lowered slightly, the reactance of the inductor (Xl) will increase and the reactance of the capacitor (Xc) will decrease. This will result in a decrease in the difference between Xl and Xc, which will ultimately result in a decrease in the total impedance of the circuit.

In an RLC Series Circuit, the Source Voltage Is Leading