Voltage drop in A.C circuit is the product of current and:
Correct answer: A. Impedance
- A. Impedance
- B. Inductance
- C. Resistance
- D. None of the above
Explanation
The correct option, "Impedance," refers to the overall opposition to the flow of current in an AC circuit, combining both resistance and reactance. In an AC circuit, voltage drop is the product of current and impedance because impedance governs the relationship between current and voltage. Impedance accounts for both the resistance (which dissipates energy as heat) and the reactance (which arises from inductance and capacitance) in the circuit. Therefore, when current flows through an AC circuit, the voltage drop across it is proportional to the impedance of the circuit.
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About Alternating Current
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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