AC Fundamental MCQ

AC Fundamental MCQ | 0 comments

Power in Alternating - Current Circuits MCQ

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we are going to share Multiple Choice Questions (MCQ) on AC Fundamentals for Electrical Engineering Students.

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    Question 1: The period of a sine wave is 5 seconds. Its frequency is?

  • 20 Hz
  • 40 Hz
  • 50 Hz
  • 30 Hz

    • Answers: 50 Hz

    Question 2: Ohm is unit of all of the following except?

  • capacitance
  • capacitive reactance
  • inductive reactance
  • resistance

    • Answers: capacitance

    Question 3: In a purely inductive circuit?

  • none of above is zero
  • apparent power is zero
  • reactive power is zero
  • actual power is zero

    • Answers: actual power is zero

    Question 4: Form factor for a sine wave is?

  • 0.637
  • 1.11
  • 1.414
  • 0.707

    • Answers: 1.11

    Question 5: In a circuit containing R, L and C, power loss can take place in?

  • C only
  • all of the above
  • R only
  • L only

    • Answers: R only

    Question 6: Power factor of magnetising component of current of a transformer is?

  • unity
  • 0.8 lag
  • 0.8 lead
  • zero

    • Answers: zero

    Question 7: For the same peak value, which of the following wave bas the least mean value ?

  • triangular wave
  • half wave rectified sine wave
  • square wave
  • sine wave

    • Answers: half wave rectified sine wave

    Question 8: All the rules and laws of DC circuit also apply to AC circuit containing?

  • inductance only
  • all of the above
  • resistance only
  • capacitance only

    • Answers: resistance only

    Question 9: The frequency of domestic power supply in India is?

  • 50 Hz
  • 200 Hz
  • 100 Hz
  • 60 Hz

    • Answers: 50 Hz

    Question 10: The power factor of a DC circuit is always?

  • zero
  • less than unity
  • greater than unity
  • unity

    • Answers: unity

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Total Questions Attempted: 0

Correct: 0 Wrong: 0

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