In an RLC circuit, the impedance is:
Correct answer: A. Combined effect of resistance and reactance
- A. Combined effect of resistance and reactance
- B. Another name of resistance
- C. Another name of inductance and capacitance
- D. None of these
Explanation
In an RLC circuit, impedance represents the combined effect of resistance and reactance, which includes the opposition to the flow of current due to both resistance (dissipating energy as heat) and reactance (resulting from inductance and capacitance).
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Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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