Discussion
Home ‣ Electrical Engineering ‣ Alternating Current and Voltage Comments
- Question
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?
Options- 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°.
- Correct Answer
- Wave A leads wave B by 15°.
- 1. If the peak of a sine wave is 13 V, the peak-to-peak value is
Options- A. 6.5 V
- B. 13 V
- C. 26 V
- D. none of the above Discuss
- 2. The average value of a 12 V peak sine wave over one complete cycle is
Options- A. 0 V
- B. 1.27 V
- C. 7.64 V
- D. 6.37 V Discuss
- 3. A signal with a 400 µs period has a frequency of
Options- A. 250 Hz
- B. 2,500 Hz
- C. 25,000 Hz
- D. 400 Hz Discuss
- 4. If the rms voltage drop across a 15 kΩ resistor is 16 V, the peak current through the resistor is
Options- A. 15 mA
- B. 1.5 mA
- C. 10 mA
- D. 1 mA Discuss
- 5. A 20 kHz pulse waveform consists of pulses that are 15 µs wide. The duty cycle
Options- A. is 1%
- B. is 30%
- C. is 100%
- D. cannot be determined Discuss
- 6. A phasor represents
Options- A. the magnitude and a quantity direction
- B. the width of a quantity
- C. the phase angle
- D. the magnitude of a quantity Discuss
- 7. A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is
Options- A. 25%
- B. 50%
- C. 1%
- D. 100% Discuss
- 8. A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is
Options- A. 45.12 mA
- B. 16 mA
- C. 39.6 mA
- D. 22.6 mA Discuss
- 9. The average half-cycle value of a sine wave with a 40 V peak is
Options- A. 25.48 V
- B. 6.37 V
- C. 14.14 V
- D. 50.96 V Discuss
- 10. To produce an 800 Hz sine wave, a four-pole generator must be operated at
Options- A. 200 rps
- B. 400 rps
- C. 800 rps
- D. 1,600 rps Discuss
Alternating Current and Voltage problems
Search Results
Correct Answer: 26 V
Correct Answer: 0 V
Correct Answer: 2,500 Hz
Correct Answer: 1.5 mA
Correct Answer: is 30%
Correct Answer: the magnitude and a quantity direction
Correct Answer: 25%
Correct Answer: 39.6 mA
Correct Answer: 25.48 V
Correct Answer: 400 rps
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