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Q.

Forbidden  energy gap  of insulator, conductor and semi conductor  is

respectively ( all  in ev)

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a

1.1, 0.7, 6

b

6, 0,1.1

c

6, 1.1, 0.7    

d

0.7, 6, 1.1

answer is B.

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Detailed Solution

Forbidden energy gap for 

 

                               Insulator – 6ev  band are separated by large gap 

 

                             Conductor  - 0  ( conduction band  and valence band overlap)

 

                             Semi conductor   - 1.1 (  for silicon)   0.7  (for Germanium)

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