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

  • If a sine wave signal is 100 mV peak-to-peak, how many volts would be measured by a voltmeter?


  • Options
  • A. 14.14 mV
  • B. 35.4 mV
  • C. 63.7 mV
  • D. 70.7 mV

  • Correct Answer
  • 35.4 mV 

    • Alternating Current vs Direct Current problems

    Search Results

    • 1. Power companies supply ac, not dc, because:

    • Options
    • A. it is easier to transmit ac
    • B. there is no longer a need for dc
    • C. dc is more dangerous
    • D. there are not enough batteries
      • Discuss
    • 2. If current varies periodically from zero to a maximum, back to zero, and then repeats, the signal is:

    • Options
    • A. direct
    • B. alternating
    • C. pulsating
    • D. repetitive
      • Discuss
    • 3. Signal comparisons may be most easily seen when using which item of test equipment?

    • Options
    • A. spectrum analyzer
    • B. multimeter
    • C. function generator
    • D. dual trace oscilloscope
      • Discuss
    • 4. What is the rms voltage value of an ac signal whose peak oscilloscope display uses 3 major divisions above the zero setting? (V/cm = 5)

    • Options
    • A. 5.3 V
    • B. 10.6 V
    • C. 15.0 V
    • D. 21.2 V
      • Discuss
    • 5. Test equipment selection enables the technician to both generate signals and:

    • Options
    • A. change circuit conditions
    • B. inject signals
    • C. sense circuit conditions
    • D. change signal frequencies
      • Discuss
    • 6. One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine a signal amplitude value is called the:

    • Options
    • A. time/cm control
    • B. position control
    • C. intensity control
    • D. volts/cm control
      • Discuss
    • 7. What is the name of a device used to directly measure the frequency of a periodic wave?

    • Options
    • A. oscilloscope
    • B. frequency meter or counter
    • C. audio frequency generator
    • D. radio frequency generator
      • Discuss
    • 8. A test equipment item that has the ability to produce either square, triangular, or sawtooth waveforms is called:

    • Options
    • A. a function generator
    • B. a radio frequency generator
    • C. an audio frequency generator
    • D. a frequency meter or counter
      • Discuss
    • 9. The distance that a signal's energy can travel in the time it takes for one cycle to occur is called the signal's:

    • Options
    • A. amplitude
    • B. frequency
    • C. wavelength
    • D. period
      • Discuss
    • 10. Why is ac current transfer more effective than dc current transfer over long distances?

    • Options
    • A. due to the height of power lines
    • B. due to the use of ac generators
    • C. due to step-up and step-down transformers reducing I2R losses
    • D. due to very high voltages
      • Discuss

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