In an inductive A.C circuit, the current:
Correct answer: A. Lags behind the voltage by 90o or π/2
- A. Lags behind the voltage by 90o or π/2
- B. Leads the voltage by 90o or π/2
- C. Lags behind the voltage by 180o or π
- D. Is in phase with the voltage
Explanation
This is the correct answer. In an inductive A.C circuit, the current lags behind the voltage by 90 degrees (π/2 radians) in phase. This phase relationship occurs because of the time it takes for the current to build up in an inductor when the voltage across it changes.
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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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