Alternating Current and Voltage MCQ

Below Alternating Current and Voltage quiz are Multiple Choice Questions (MCQs) type Quiz. These Alternating Current and Voltage MCQ Questions helps you to refresh your Alternating Current and Voltage, you can see the correct option by clicking on it. .
  • 1. If an electric bulb is connected to an AC source, which of the following statement is true about the phase difference between the voltage across the bulb and current flowing in it?

    • In phase.
    • Not in phase.
    • The voltage is leading the current.
    • The current is leading the voltage.
  • 2. What is the phase angle between the voltages of the inductor and capacitor in a RLC series circuit?

    • zero
    • 90°
    • 180°
    • 270°
  • 3. All of the following have the same units except:

    • inductance.
    • capacitive reactance.
    • impedance.
    • resistance.
  • 4. A resistor is connected to an AC power supply. On this circuit, the current

    • leads the voltage by 90°.
    • lags the voltage by 90°.
    • is in phase with the voltage.
    • none of the given answers
  • 5. Power Factor (Cos θ) =_________?

    • R/Z
    • The Cosine of angle between rms Current and rms voltage
    • Both A and B
    • None of these
  • 6. Which of the following is true of the current in a capacitive circuit?

    • It leads the voltage.
    • It lags the voltage.
    • It is the same as the voltage.
    • It counteracts the voltage.
  • 7. A pure capacitor is connected to an AC power supply. In this circuit, the current

    • leads the voltage by 90°.
    • lags the voltage by 90°.
    • is in phase with the voltage.
    • none of the given answers