WAEC Physics 2014 Objective — Question 37
Question 37 of 50 from the West African Examinations Council (WAEC) Physics 2014 Objective paper, with the correct answer and a full explanation.
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In an a.c. circuit, when the supply voltage frequency is equal to the resonant frequency, the current
- A. leads the supply voltage by 90°
- B. lags behind the supply voltage by 90°
- C. leads the supply voltage by 45°
- D. is in phase with the supply voltageCorrect
Explanation
At resonance in an a.c. circuit, the current is in phase with the supply voltage.
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