Alternating Current And Voltage MCQ Questions & Answers

1.
To produce an 800 Hz sine wave, a four-pole generator must be operated at

A. 200 rps

B. 400 rps

C. 800 rps

D. 1,600 rps

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2.
Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

A. Wave A leads wave B by 15°

B. Wave A lags wave B by 15°

C. Wave A leads wave B by 105°

D. Wave A lags wave B by 105°

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3.
A ramp is the type of waveform characterized by a non-linear increase or decrease in voltage or current.

A. True

B. False

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4.
Amplitude is the maximum value of a voltage or current.

A. True

B. False

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5.
The average half-cycle value of a sine wave with a 40 V peak is

A. 25.48 V

B. 6.37 V

C. 14.14 V

D. 50.96 V

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6.
A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of

A. 25 kHz

B. 12 kHz

C. 18 kHz

D. 1.3 MHz

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7.
When a sine wave has a frequency of 100 Hz in 12 s it goes through

A. $$\frac{1}{{100}}$$ cycle

B. 12 cycles

C. 120 cycles

D. 1,200 cycles

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8.
If a sine wave goes through 10 cycles in 20 µs, the period is

A. 20 µs

B. 4 µs

C. 2 µs

D. 100 µs

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9.
A phasor represents

A. The magnitude and a quantity direction

B. The width of a quantity

C. The phase angle

D. The magnitude of a quantity

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10.
A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is

A. 4 V

B. 4.6 V

C. 1.6 V

D. 11 V

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Alternating Current And Voltage MCQ Questions & Answers | Electrical Engineering

1. To produce an 800 Hz sine wave, a four-pole generator must be operated at

Answer & Solution

2. Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

Answer & Solution

3. A ramp is the type of waveform characterized by a non-linear increase or decrease in voltage or current.

Answer & Solution

4. Amplitude is the maximum value of a voltage or current.

Answer & Solution

5. The average half-cycle value of a sine wave with a 40 V peak is

Answer & Solution

6. A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of

Answer & Solution

7. When a sine wave has a frequency of 100 Hz in 12 s it goes through

Answer & Solution

8. If a sine wave goes through 10 cycles in 20 µs, the period is

Answer & Solution

9. A phasor represents

Answer & Solution

10. A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is

Answer & Solution

1.
To produce an 800 Hz sine wave, a four-pole generator must be operated at

2.
Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

3.
A ramp is the type of waveform characterized by a non-linear increase or decrease in voltage or current.

4.
Amplitude is the maximum value of a voltage or current.

5.
The average half-cycle value of a sine wave with a 40 V peak is

6.
A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of

7.
When a sine wave has a frequency of 100 Hz in 12 s it goes through

8.
If a sine wave goes through 10 cycles in 20 µs, the period is

9.
A phasor represents

10.
A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is