Discussion
Home ‣ Electrical Engineering ‣ Alternating Current and Voltage Comments
- Question
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
- Correct Answer
- 2,500 Hz
- 1. 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
- 2. 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
- 3. If the rms current through a 4.7 kΩ resistor is 4 mA, the peak voltage drop across the resistor is
Options- A. 4 V
- B. 18.8 V
- C. 26.6 V
- D. 2.66 V Discuss
- 4. When a sine wave has a frequency of 100 Hz in 12 s it goes through
Options- A. 1/100 cycle
- B. 12 cycles
- C. 120 cycles
- D. 1,200 cycles Discuss
- 5. A sawtooth wave has a period of 10 ms. Its frequency is
Options- A. 10 Hz
- B. 50 Hz
- C. 100 Hz
- D. 1,000 Hz Discuss
- 6. 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
- 7. 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
- 8. 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°. Discuss
- 9. 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
- 10. 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
Alternating Current and Voltage problems
Search Results
Correct Answer: 1.5 mA
Correct Answer: is 30%
Correct Answer: 26.6 V
Correct Answer: 1,200 cycles
Correct Answer: 100 Hz
Correct Answer: 0 V
Correct Answer: 26 V
Correct Answer: Wave A leads wave B by 15°.
Correct Answer: the magnitude and a quantity direction
Correct Answer: 25%
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