When A.C voltage source is connected to a capacitor:
Correct answer: B. Current I leads the voltage
- A. Voltage V lags behind current I
- B. Current I leads the voltage
- C. Voltage leads the current I
- D. Both (a) and (b)
Explanation
The correct option ("Current I leads the voltage") indicates that in a capacitive circuit, the current reaches its maximum value before the voltage does. This is due to the charging and discharging behavior of the capacitor in response to changes in voltage.
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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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