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Home ‣ Electronics ‣ Alternating Current vs Direct Current Comments
  • Question

  • What is the waveform period of a square wave signal that horizontally covers 3 major divisions per cycle? (time/cm = 50 ms)


  • Options
  • A. 50 ms
  • B. 100 ms
  • C. 150 ms
  • D. 200 ms

  • Correct Answer
  • 150 ms 

    • Alternating Current vs Direct Current problems

    Search Results

    • 1. Which percentages of full-amplitude rise time are used for a pulse wave?

    • Options
    • A. 0 to 50 percent
    • B. 0 to 100 percent
    • C. 5 to 95 percent
    • D. 10 to 90 percent
      • Discuss
    • 2. What does the CRT oscilloscope display?

    • Options
    • A. voltage and period
    • B. current and frequency
    • C. rms voltage and current
    • D. frequency and voltage
      • Discuss
    • 3. The power that is distributed from a power plant to your home is:

    • Options
    • A. high voltage to high voltage
    • B. low voltage to high voltage
    • C. high voltage to low voltage
    • D. low voltage to low voltage
      • Discuss
    • 4. What voltage will an ac voltmeter display?

    • Options
    • A. rms
    • B. average
    • C. peak
    • D. peak-to-peak
      • Discuss
    • 5. The magnitude that an alternation varies from zero is called its:

    • Options
    • A. altitude
    • B. amplitude
    • C. attitude
    • D. polarity
      • Discuss
    • 6. A sine wave reaches maximum positive voltage at:

    • Options
    • A. 90°
    • B. 0°
    • C. ?90°
    • D. 360°
      • Discuss
    • 7. How long would it take to transmit an electromagnetic wave to a receiving antenna 1,000 miles away?

    • Options
    • A. 5.38 ms
    • B. 10.8 ms
    • C. 53.8 ms
    • D. 108 ms
      • Discuss
    • 8. What is the period of a 16 MHz sine wave?

    • Options
    • A. 196 ns
    • B. 62.5 ns
    • C. 31.25 ns
    • D. 19.9 ns
      • Discuss
    • 9. What is the peak-to peak voltage of a 56 Vrms ac voltage?

    • Options
    • A. 158 V
    • B. 164 V
    • C. 82 V
    • D. 79 V
      • Discuss
    • 10. To operate properly, a transistor's base-emitter junction must be forward biased with reverse bias applied to which junction?

    • Options
    • A. collector-emitter
    • B. base-collector
    • C. base-emitter
    • D. collector-base
      • Discuss

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