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Subel. C
6 questions
Subelement C

Components

Section 28

Devices

What describes a diode junction that is forward biased?

  • It is a high impedance.
  • It conducts very little current.
  • Correct Answer
    It is a low impedance.
  • It is an open circuit.

What describes a diode junction that is forward biased?

It is a low impedance.

For additional information, please see PV Education site for the article Bias of PN Junctions, especially paragraph on Diodes under Forward Bias.

Also, a great overview of diodes is at Electroniclinic site, in the article
Semiconductor Diodes and its Types

See Resources PCB Cadence article on Forward Bias vs. Reverse Bias and their Effects on Diode Functionality

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Why are special precautions necessary in handling FET and CMOS devices?

  • They have fragile leads that may break off.
  • Correct Answer
    They are susceptible to damage from static charges.
  • They have micro-welded semiconductor junctions that are susceptible to breakage.
  • They are light sensitive.

Why are special precautions necessary in handling FET and CMOS devices?

They are susceptible to damage from static charges.

Please see Electro Schematics site for the article Static Electricity and Precautions

Also, see the Navsea Navy Mil site for the pdf document titled ELECTROSTATIC DISCHARGE CONSIDERATIONS

See Wikipedia's article on CMOS

For more information, please see ElProCus site for the article on What is a CMOS : Working Principle & Its Applications

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What do the initials CMOS stand for?

  • Common mode oscillating system.
  • Complementary mica-oxide silicon.
  • Correct Answer
    Complementary metal-oxide semiconductor.
  • Complementary metal-oxide substrate.

What do the initials CMOS stand for?

Complementary metal-oxide semiconductor.

See Wikipedia's article on CMOS

For more information, please see ElProCus site for the article on What is a CMOS : Working Principle & Its Applications

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What is the piezoelectric effect?

  • Correct Answer
    Mechanical vibration of a crystal by the application of a voltage.
  • Mechanical deformation of a crystal by the application of a magnetic field.
  • The generation of electrical energy by the application of light.
  • Reversed conduction states when a P-N junction is exposed to light.

What is the piezoelectric effect?

Mechanical vibration of a crystal by the application of a voltage.

Some materials, when between two metal plates, and under mechanical pressure do produce electrical charge. It is used to change electrical audio vibration signals to sound waves.

Please see Wikipedia's articles on Piezoelectricity Crystal oscillator

And, please see Electronic Design site for the article What is the Piezoelectric Effect?

For more information, please see the Electronics Tutorials site for the article Quartz Crystal Oscillators

Also, please see the Elprocus site for the article Crystal Oscillator Circuit and Working

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An electrical relay is a:

  • Current limiting device.
  • Device used for supplying 3 or more voltages to a circuit.
  • Component used mainly with HF audio amplifiers.
  • Correct Answer
    Remotely controlled switching device.

An electrical relay is a:

Remotely controlled switching device.

If you can control it with an electrical signal, then it is an electrical relay, as it remote door locks, etc, which use electromechanical relays.

See Wikipedia's article on Relay

For more information, please see the Electronics Tutorials site for the article Electrical Relay

Also, please see the Electrical Technology site for the article Difference Between Relay and Circuit Breaker

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In which oscillator circuit would you find a quartz crystal?

  • Hartley.
  • Correct Answer
    Pierce
  • Colpitts.
  • All of the above.

In which oscillator circuit would you find a quartz crystal?

Pierce

Please see Wikipedia's article on Crystal oscillator

For more information, please see the Electronics Tutorials site for the article Quartz Crystal Oscillators

Also, please see the Elprocus site for the article Crystal Oscillator Circuit and Working

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