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  5. ASVAB Section 5: Electronic Information

Free ASVAB Section 5: Electronic Information Exam Braindumps (page: 19)

Page 18 of 46
PDF with 180 Questions

A filter is used in a power supply to ________________.

  1. convert alternating current to direct current.
  2. change direct current to alternating current.
  3. even out voltage variations.
  4. smooth out power surges.

Answer(s): C

Explanation:

A filter is placed in the power supply to even out any voltage variations. In some cases, a choke may be used in the filter to smooth out the current variations.



Which of the following contains an electromagnet?

  1. Light switch
  2. Doorbell
  3. Fluorescent lightbulb
  4. Incandescent lightbulb

Answer(s): B

Explanation:

Of the items listed, only a doorbell contains an electromagnet.



Radio frequency amplifiers are used in __________________.

  1. audio amplifiers
  2. differential amplifiers
  3. operational amplifiers
  4. receivers and transmitters

Answer(s): D

Explanation:

Radio frequency amplifiers are used in receivers and transmitters to amplify frequencies above the range of sounds audible to humans.



A crystal microphone uses _____________.

  1. the piezoelectric effect
  2. the Doppler effect
  3. magnetic wavicles to operate
  4. a permanent magnet for resonance

Answer(s): A

Explanation:

A crystal microphone relies on the piezoelectric effect, where a pressure on a crystal produces an electric current.






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