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Home Electronics Alternating Current vs Direct Current Comments

  • Question
  • If the frequency of a radio wave is increased, then its wavelength will:


  • Options
  • A. increase
  • B. decrease
  • C. remain the same
  • D. cannot tell

  • Correct Answer
  • decrease 


  • Alternating Current vs Direct Current problems


    Search Results


    • 1. What is the average value of a 12 V peak wave?

    • Options
    • A. 3.82 V
    • B. 4.24 V
    • C. 7.64 V
    • D. 9.42 V
    • Discuss
    • 2. What is the name of a device that converts sound waves to electrical waves?

    • Options
    • A. an amplifier
    • B. an antenna
    • C. a filter
    • D. a microphone
    • Discuss
    • 3. AC effective voltage is named:

    • Options
    • A. average
    • B. peak
    • C. peak-to-peak
    • D. root mean square
    • Discuss
    • 4. If a voltmeter measures a sine wave as 500 mV, what would be its average value?

    • Options
    • A. 159.0 mV
    • B. 318.5 mV
    • C. 353.5 mV
    • D. 451.0 mV
    • Discuss
    • 5. What is the peak-to-peak current value when an ammeter measures a 20 mA value?

    • Options
    • A. 14 mA
    • B. 28 mA
    • C. 40 mA
    • D. 57 mA
    • Discuss
    • 6. A triangle wave consists of repeating:

    • Options
    • A. positive ramps only
    • B. negative ramps only
    • C. positive and negative ramps of equal value
    • D. positive and negative ramps of unequal value
    • Discuss
    • 7. One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine a waveform period is called a:

    • Options
    • A. focus control
    • B. time/cm control
    • C. intensity control
    • D. volts/cm control
    • Discuss
    • 8. What term expresses the frequency of a rectangular wave?

    • Options
    • A. Hz
    • B. period
    • C. PRF
    • D. PRT
    • Discuss
    • 9. One adjustable knob on the oscilloscope that allows the trace to be aligned with a reference graticule is called the:

    • Options
    • A. position control
    • B. focus control
    • C. intensity control
    • D. volts/cm control
    • Discuss
    • 10. What is the peak value of a household appliance that uses a 230 V ac source?

    • Options
    • A. 163 V
    • B. 230 V
    • C. 325 V
    • D. 480 V
    • Discuss


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