Electrician Red Seal · Question
In an AC circuit, what does 'impedance' (Z) represent?
Impedance (Z) is the complex sum of resistance (R) and total reactance (X), which includes inductive reactance (XL) and capacitive reactance (XC). It represents
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Question: In an AC circuit, what does 'impedance' (Z) represent?
Answer options:
- The opposition to current flow from resistance only. ✅ The total opposition to current flow from resistance, capacitive reactance, and inductive reactance.
- The stored energy in the circuit's magnetic field.
- The phase difference between voltage and current.
Correct answer: The total opposition to current flow from resistance, capacitive reactance, and inductive reactance.
Explanation: Impedance (Z) is the complex sum of resistance (R) and total reactance (X), which includes inductive reactance (XL) and capacitive reactance (XC). It represents the total opposition to the flow of alternating current in a circuit.
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