Which term describes the total opposition to current flow in an alternating-current circuit?

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Multiple Choice

Which term describes the total opposition to current flow in an alternating-current circuit?

Explanation:
Impedance is the total opposition to current flow in an alternating-current circuit. It combines resistance, which dissipates energy as heat, with reactance from inductors and capacitors that depends on frequency and causes a phase difference between voltage and current. The overall opposition is expressed in ohms and can be calculated as Z = sqrt(R^2 + (X_L - X_C)^2). Other terms listed aren’t related to electrical circuit behavior; they pertain to materials or joints, not how AC current is resisted.

Impedance is the total opposition to current flow in an alternating-current circuit. It combines resistance, which dissipates energy as heat, with reactance from inductors and capacitors that depends on frequency and causes a phase difference between voltage and current. The overall opposition is expressed in ohms and can be calculated as Z = sqrt(R^2 + (X_L - X_C)^2). Other terms listed aren’t related to electrical circuit behavior; they pertain to materials or joints, not how AC current is resisted.

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