Diode - Diode objective questions and answers


16. The silicon diodes can be operated upto a temperature of the order of


   A.1200C

   B.1600C

   C.2000C

   D.3000C


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C.2000C

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17. A doped semiconductor is called


   A.Bipolar semiconductor

   B.Dipole semiconductor

   C.Impure semiconductor

   D.Extrinsic semiconductor


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D.Extrinsic semiconductor

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18. The knee voltage of a diode approximately is equal to the


   A.Breakdown voltage

   B.Barrier potential

   C.Applied voltage

   D.Forward voltage


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B.Barrier potential

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19. If the bulk resistance of a diode is zero, the graph above the knee becomes


   A.Tilted at 450

   B.Vertical

   C.Horiozontal

   D.None of the above


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B.Vertical

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20. The potential barrier existing across a PN junction


   A.Neutralizes doped impurities with semiconductor material forming neutral compound

   B.Prevents total recombination of holes and electrons

   C.Facilitates combination of holes and electrons

   D.None of the above


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B.Prevents total recombination of holes and electrons

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