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Questions  

Three semiconductors are arranged in the increasing order of their energy gap as follows.  The correct arrangement is

a
Tellurium, germanium, silicon
b
Tellurium, silicon, germanium
c
Silicon, germanium, tellurium
d
Silicon, tellurium, germanium

detailed solution

Correct option is A

The energy gap in the case of germanium  is 0.74 eV. In the case of silicon, the energy gap is nearly 1 eV.

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In pure silicon at 300 K the electron and hole concentration is each equal to 1.5×1016m3 When doped with indium, the hole concentration increases to 4.5×1022m3 What is the electron concentration in doped silicon?


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