Electrical Engineering MCQs on AC Fundamentals
Contents
- 1 The RMS value of half wave rectified sine wave is 200 V. The RMS value of full wave rectified AC will be
- 2 The product of apparent power and cosine of the phase angle between circuit voltage and current is
- 3 In a series resonant circuit, the impedance is
- 4 Skin effect occurs when a conductor carries current at
- 5 Power factor of which of following circuit will be zero
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
- 141.4 V
- 282.8 V
- 546 V
- 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
- Instantaneous power
- Reactive power
- True power
- Volt-amperes
Correct answer: 3. True power
In a series resonant circuit, the impedance is
In a series resonant circuit, the impedance is
- Minimum
- Maximum
- Zero
- 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
- High frequencies
- Low frequencies
- Medium frequencies
- 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
- Resistance
- Inductance
- Capacitance
- Both 2 and 3
Correct answer: 4. Both 2 and 3