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Alternating Current Applied to an Inductor

In a circuit,...

Question

In a circuit, the current lags behind the voltage by a phase difference of $π / 2$ , the circuit will contain which of the following:

A

Only R

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B

Only C

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C

R and C

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D

Only L

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Solution

The correct option is D Only L
In an inductor, current lags behind the input voltage by a phase difference of $π / 2$ .
Current and voltage are in same phase in resistor whereas current leads the voltage by $π / 2$ in a capacitor.
So, the circuit must contain an inductor only.

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