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An LCR series circuit is connected to a source of alternating current. At resonance, the applied voltage and the current flowing through the circuit will have a phase difference of

1. π / 4
2. π / 2
3. π
4. 0

Correct answer: 0

Solution

At resonance in an LCR circuit, the inductive reactance equals the capacitive reactance, causing the net reactance to be zero. This results in the voltage and current being in phase, with a phase difference of 0.

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