AC Fundamentals MCQs Part 2

Electrical Engineering MCQs on AC Fundamentals

The RMS value of half wave rectified sine wave is 200 V. The RMS value of full wave rectified AC will be

The RMS value of half wave rectified sine wave is 200 V. The RMS value of full wave rectified AC. will be

  1. 141.4 V
  2. 282.8 V
  3. 546 V
  4. 87.5 V

Correct answer: 2. 282.8 V

The product of apparent power and cosine of the phase angle between circuit voltage and current is

The product of apparent power and cosine of the phase angle between circuit voltage and current is

  1. Instantaneous power
  2. Reactive power
  3. True power
  4. Volt-amperes

Correct answer: 3. True power

In a series resonant circuit, the impedance is

In a series resonant circuit, the impedance is

  1. Minimum
  2. Maximum
  3. Zero
  4. None of these

Correct answer: 1. Minimum

Skin effect occurs when a conductor carries current at

Skin effect occurs when a conductor carries current at

  1. High frequencies
  2. Low frequencies
  3. Medium frequencies
  4. Very low frequencies

Correct answer: 1. High frequencies

Power factor of which of following circuit will be zero

Power factor of which of following circuit will be zero

  1. Resistance
  2. Inductance
  3. Capacitance
  4. Both 2 and 3

Correct answer: 4. Both 2 and 3

Leave a Reply