General Science • PhysicsHard
In the context of alternating current circuits, what is the phase relationship between voltage and current across a pure inductive load?
A. Current leads voltage by ninety degrees
B. Voltage leads current by ninety degrees✓ Correct Answer
C. Voltage and current are completely in phase
D. Current lags voltage by one hundred eighty degrees
💡 Solution & Explanation
In an ideal inductive circuit, the alternating voltage leads the alternating current by a phase angle of ninety degrees because the induced counter electromotive force opposes the rate of change of current. Capacitive circuits exhibit the opposite phase relationship where current leads voltage. Pure resistors maintain voltage and current perfectly in phase with zero phase difference.
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