Resonance and its applications

Explanation of question 13

In a resonant circuit, the supply current

  1. is in anti-phase to the supply voltage
  2. is in phase with the supply voltage
  3. lags the supply voltage by 90°
  4. leads the supply voltage by 90°

The answer is :- 2 A circuit at resonance behaves as a pure resistor, therefore the supply voltage and current are in phase.

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