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Alternating Current and Voltage problems

  • 1. Electronics Alternating Current and Voltage: What is the peak

    What is the peak voltage across R3 in the given circuit?


  • Options
  • A. 1.2 V
  • B. 5 V
  • C. 7 V
  • D. 12 V
    • Discuss
  • 2. A rectangular wave that has a duty cycle of 50% could be called a

  • Options
  • A. "c" wave
  • B. sawtooth wave
  • C. square wave
  • D. triangular wave
    • Discuss
  • 3. A single-phase induction motor

  • Options
  • A. is self-starting
  • B. operates at a fixed speed
  • C. is less reliable than a three-phase synchronous motor
  • D. none of the above
    • Discuss
  • 4. Electronics Alternating Current and Voltage: What is the pea

    What is the peak-to-peak voltage of the waveform in the given circuit?


  • Options
  • A. 2 V
  • B. 4 V
  • C. 6 V
  • D. 8 V
    • Discuss
  • 5. What is the average voltage when a rectangular wave's base line voltage is 20 V, its peak-to-peak voltage is 50 V, and its duty cycle is 20%?

  • Options
  • A. 26 V
  • B. 30 V
  • C. 40 V
  • D. 45 V
    • Discuss
  • 6. Electronics Alternating Current and Voltage: Calculate the d

    Calculate the duty cycle of the repetitive pulse waveform in the given circuit.


  • Options
  • A. 8.33%
  • B. 0%
  • C. 33.33%
  • D. 25%
    • Discuss
  • 7. A half-cycle average voltage of 12 V is equal to what rms voltage?

  • Options
  • A. 13.33 V
  • B. 8.48 V
  • C. 18.84 V
  • D. 7.64 V
    • Discuss
  • 8. The effective value of a sine wave is equal to

  • Options
  • A. 0.707 of peak voltage
  • B. 0.636 of peak voltage
  • C. sin 45° of peak voltage
  • D. both 0.707 of peak voltage and sin 45° of peak voltage
    • Discuss
  • 9. Most practical alternators generate electricity from

  • Options
  • A. a coil rotating within a magnetic field
  • B. a magnetic field rotating around fixed windings
  • C. a permanent magnet rotating within a varying electromagnetic field
  • D. none of the above
    • Discuss
  • 10. Electronics Alternating Current and Voltage: Calculate the po

    Calculate the positive-going slope of the waveform in the given circuit.


  • Options
  • A. 5 V/ms
  • B. 2.5 V/ms
  • C. 2.5 V/s
  • D. 5 V/s
    • Discuss

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