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Home Electronics Alternating Current vs Direct Current Comments

  • Question
  • 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

  • Correct Answer
  • dual trace oscilloscope 


  • Alternating Current vs Direct Current problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. The phase difference between sine waves of different frequencies is:

    • Options
    • A. equal to their frequency differences
    • B. the difference in their fixed time displacement
    • C. the same throughout time
    • D. constantly changing
    • Discuss
    • 4. What are the two main applications for ac?

    • Options
    • A. direct, pulsating
    • B. electric, magnetic
    • C. power, information
    • D. static, dynamic
    • Discuss
    • 5. The current is flowing in what direction?


    • Options
    • A. clockwise
    • B. counterclockwise
    • C. in both directions at the same time
    • D. 50% of the time clockwise and 50% of the time counterclockwise
    • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • Discuss
    • 9. 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
    • 10. 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


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