In a series RLC ac circuit, a second resistor is connected in parallel with the resistor previously in the circuit. As a result of this change, what happens to the impedance of the circuit?
A) It decreases.
B) It does not change.
C) It decreases for frequencies below resonance and increases for frequencies above resonance.
D) It increases for frequencies below resonance and decreases for frequencies above resonance.
E) It increases.

Question

Quizplus · Accepted Answer

Adding a resistor in parallel with the existing resistor in an RLC circuit effectively reduces the overall resistance of the circuit without altering the inductance or capacitance. This reduction in resistance leads to a decrease in the overall impedance of the circuit, as impedance in an RLC circuit is influenced by resistance, inductance, and capacitance.

In a Series RLC Ac Circuit, a Second Resistor Is