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  • Question
  • When an electron jumps from the valence shell to the conduction band, it leaves a gap. What is this gap called?


  • Options
  • A. energy gap
  • B. hole
  • C. electron-hole pair
  • D. recombination

  • Correct Answer
  • hole 


  • Semiconductor Principles problems


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    • 1. In "p" type material, minority carriers would be:

    • Options
    • A. holes
    • B. dopants
    • C. slower
    • D. electrons
    • Discuss
    • 2. Which semiconductor material is made from coal ash?

    • Options
    • A. germanium
    • B. silicon
    • C. tin
    • D. carbon
    • Discuss
    • 3. Which of the following cannot actually move?

    • Options
    • A. majority carriers
    • B. ions
    • C. holes
    • D. free electrons
    • Discuss
    • 4. One problem with mechanically variable resistors is noticeable in audio circuits as:

    • Options
    • A. scratchy noise
    • B. lack of bass response
    • C. variable volume
    • D. too much treble response
    • Discuss
    • 5. With Ohm's law, no change in resistance means that current and voltage will be:

    • Options
    • A. directly proportional
    • B. unable to produce energy
    • C. the same
    • D. inversely proportional
    • Discuss
    • 6. Ionization within a P-N junction causes a layer on each side of the barrier called the:

    • Options
    • A. junction
    • B. depletion region
    • C. barrier voltage
    • D. forward voltage
    • Discuss
    • 7. Silicon atoms combine into an orderly pattern called a:

    • Options
    • A. covalent bond
    • B. crystal
    • C. semiconductor
    • D. valence orbit
    • Discuss
    • 8. Which material may also be considered a semiconductor element?

    • Options
    • A. carbon
    • B. ceramic
    • C. mica
    • D. argon
    • Discuss
    • 9. What is the voltage across R1 if the P-N junction is made of silicon?


    • Options
    • A. 12 V
    • B. 11.7 V
    • C. 11.3 V
    • D. 0 V
    • Discuss
    • 10. What is an energy gap?

    • Options
    • A. the space between two orbital shells
    • B. the energy equal to the energy acquired by an electron passing a 1 V electric field
    • C. the energy band in which electrons can move freely
    • D. an energy level at which an electron can exist
    • Discuss


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