The width of forbidden gap in silicon crystal is 1.1 
When the crystal is converted into a 
‐type semiconductor the distance of Fermi level from conduction band is
A
Greater than 0.55 
B
Equal to 0.55 
C
Lesser than 0.55 
D
Equal to 1.1 
Text Solution
Verified by ExpertsThe correct answer is:
C
For intrinsic silicon:
So intrinsic Fermi level lies at middle:
In an N-type semiconductor, Fermi level shifts towards conduction band.
Hence distance from conduction band becomes less than 
.
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