Multiple Choice Questions and Answers on Semiconductor Theory

Q31.  The leakage current in a pn junction is of the order of

  1. Aa
  2. mA
  3. kA
  4. µA

Answer : 4

Q32. In an intrinsic semiconductor, the number of free electrons ………

  1. Equals the number of holes
  2. Is greater than the number of holes
  3. Is less than the number of holes
  4. None of the above

Answer : 1

Q33. At room temperature, an intrinsic semiconductor has ……….

  1. Many holes only
  2. A few free electrons and holes
  3. Many free electrons only
  4. No holes or free electrons

Answer : 2

Q34. At absolute temperature, an intrinsic semiconductor has ……….

  1. A few free electrons
  2. Many holes
  3. Many free electrons
  4. No holes or free electrons

Answer : 4

Q35. At room temperature, an intrinsic silicon crystal acts approximately as ……

  1. A battery
  2. A conductor
  3. An insulator
  4. A piece of copper wire

Answer : 3

Q36. Under normal conditions a diode conducts current when it is ……………

  1. reverse biased
  2. forward biased
  3. avalanched
  4. saturated

Answer : 2

Q37. The term bias in electronics usually means ……….

  1. the value of ac voltage in the signal.
  2. the condition of current through a pn junction.
  3. the value of dc voltages for the device to operate properly.
  4. the status of the diode.

Answer : 3

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