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Home ‣ Electronics ‣ Alternating Current and Voltage Comments
  • Question

  • 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

  • Correct Answer
  • 30 V 

    • Alternating Current and Voltage problems

    Search Results

    • 1. 

      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
    • 2. 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
    • 3. 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
    • 4. 

      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
    • 5. If voltage across a resistance doubles

    • Options
    • A. the current is halved
    • B. the resistance doubles
    • C. the current is unchanged
    • D. none of the above
      • Discuss
    • 6. 

      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. 

      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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