Electrical Engineering MCQs on AC Fundamentals
Contents
- 1 The voltage of domestic supply is 220 V. The number 220 is
- 2 The RMS value of alternating current is given by steady DC current which when flowing through a given circuit for a given time produces
- 3 In highly capacitive circuit which of following is correct
- 4 In pure resistive circuit
- 5 Keeping the same peak value which of the following wave will have the highest RMS value
The voltage of domestic supply is 220 V. The number 220 is
The voltage of domestic supply is 220 V. The number 220 is
- Average value
- Mean value
- Peak value
- RMS value
Correct answer: 4. RMS value
The RMS value of alternating current is given by steady DC current which when flowing through a given circuit for a given time produces
The RMS value of alternating current is given by steady DC current which when flowing through a given circuit for a given time produces
- The more heat than produced by A.C. when flowing through the same circuit
- The same heat as produced by A.C. when flowing through the same circuit
- The less heat than produced by A.C. flowing through the same circuit
- None of these
Correct answer: 2. The same heat as produced by A.C. when flowing through the same circuit
In highly capacitive circuit which of following is correct
In highly capacitive circuit which of following is correct
- Actual power is more than its reactive power
- Apparent power is equal to the actual power
- Reactive power is more than the actual power
- Reactive power is more than the apparent power
Correct answer: 3. Reactive power is more than the actual power
In pure resistive circuit
In pure resistive circuit
- Current can lead or lag the voltage by 90°
- Current is in phase with the voltage
- Current lags behind the voltage by 90°
- Current leads the voltage by 90°
Correct answer: 2. Current is in phase with the voltage
Keeping the same peak value which of the following wave will have the highest RMS value
Keeping the same peak value which of the following wave will have the highest RMS value
- Half wave rectified sine wave
- Sine wave
- Square wave
- Triangular wave
Correct answer: 3. Square wave