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  • Question
  • A commonly used pentavalent material is:


  • Options
  • A. arsenic
  • B. boron
  • C. gallium
  • D. neon

  • Correct Answer
  • arsenic 


  • Semiconductor Principles problems


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    • 1. Forward bias of a silicon P-N junction will produce a barrier voltage of approximately how many volts?

    • Options
    • A. 0.2
    • B. 0.3
    • C. 0.7
    • D. 0.8
    • Discuss
    • 2. Minority carriers are many times activated by:

    • Options
    • A. heat
    • B. pressure
    • C. dopants
    • D. forward bias
    • Discuss
    • 3. If conductance increases as temperature increases, this is known as a:

    • Options
    • A. positive coefficient
    • B. negative current flow
    • C. negative coefficient
    • D. positive resistance
    • Discuss
    • 4. 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
    • 5. 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
    • 6. What is a type of doping material?

    • Options
    • A. extrinsic semiconductor material
    • B. pentavalent material
    • C. n-type semiconductor
    • D. majority carriers
    • Discuss
    • 7. In "n" type material, majority carriers would be:

    • Options
    • A. holes
    • B. dopants
    • C. slower
    • D. electrons
    • Discuss
    • 8. When is a P-N junction formed?

    • Options
    • A. in a depletion region
    • B. in a large reverse biased region
    • C. the point at which two opposite doped materials come together
    • D. whenever there is a forward voltage drop
    • Discuss
    • 9. Intrinsic semiconductor material is characterized by a valence shell of how many electrons?

    • Options
    • A. 1
    • B. 2
    • C. 4
    • D. 6
    • Discuss
    • 10. A P-N junction mimics a closed switch when it:

    • Options
    • A. has a low junction resistance
    • B. is reverse biased
    • C. cannot overcome its barrier voltage
    • D. has a wide depletion region
    • Discuss


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