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Home ‣ Electrical Engineering ‣ Alternating Current and Voltage Comments
  • Question

  • One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is


  • Options
  • A. 0°
  • B. 45°
  • C. 40°
  • D. none of the above

  • Correct Answer
  • 40° 

    • Alternating Current and Voltage problems

    Search Results

    • 1. A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is

    • Options
    • A. 6 V
    • B. 30 V
    • C. 35 V
    • D. 0 V
      • Discuss
    • 2. If a sine wave goes through 10 cycles in 20 µs, the period is

    • Options
    • A. 20 µs
    • B. 4 µs
    • C. 2 µs
    • D. 100 µs
      • Discuss
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. A square wave has a period of 60 µs. The first odd harmonic is

    • Options
    • A. 5 kHz
    • B. 50 kHz
    • C. 500 kHz
    • D. 33.33 kHz
      • Discuss
    • 7. The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is

    • Options
    • A. 40 Hz
    • B. 100 Hz
    • C. 400 Hz
    • D. indeterminable
      • Discuss
    • 8. A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of

    • Options
    • A. 25 kHz
    • B. 12 kHz
    • C. 18 kHz
    • D. 1.3 MHz
      • Discuss
    • 9. A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of

    • Options
    • A. 0.0045 s
    • B. 2 ms
    • C. 1.5 ms
    • D. 3,000 µs
      • Discuss
    • 10. A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current

    • Options
    • A. is increased
    • B. is decreased
    • C. does not change
    • D. momentarily goes to zero
      • Discuss

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