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