In an A.C circuit with capacitor only, the current:
Correct answer: A. Leads the voltage by 90o or π/2
- A. Leads the voltage by 90o or π/2
- B. Lags behind voltage by 90o or π/2
- C. In phase with voltage
- D. None of the above
Explanation
This is the correct answer. In a circuit with only a capacitor, the current leads the voltage by 90 degrees (π/2 radians) in phase. This phase relationship occurs because the voltage across a capacitor leads to a change in the rate of charge or discharge of the capacitor, causing the current to be out of phase with the voltage.
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About AC Through Resistor, Capacitor and Inductor
Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.
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