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Topic Question Set

Q 1 :    

The increase in the width of the depletion region in a p–n junction diode is due to            [2020]

  • forward bias only 

     

  • reverse bias only

     

  • both forward bias and reverse bias

     

  • increase in forward current 

     

(2)

Width of the depletion layer increases in reverse biasing.

 

Q 2 :    

The barrier potential of a p–n junction depends on
(1) type of semiconductor material
(2) amount of doping
(3) temperature  
Which one of the following is correct?                                  [2014]

  • (1) and (2) only 

     

  • (2) only

     

  • (2) and (3) only

     

  • (1), (2) and (3)

     

(4)

The barrier potential depends on type of semiconductor (For Si, Vb = 0.7 V and for Ge, Vb = 0.3 V), amount of doping and also on the temperature.