AP EAMCET · PHYSICS · Semiconductors
Consider the statements
In a semi conductor
(A) There are no free electrons at .
(B) There are no free electrons at any temperature
(C) The number of free electrons increases with temperature,
(D) The number of free electrons is less than that in a conductor.
- A B,C,D are true but A is false
- B A,B,C are true but D is false
- C A,C,D are true but B is false.
- D A,B,C and D are all true.
Answer & Solution
Correct Answer
(C) A,C,D are true but B is false.
Step-by-step Solution
Detailed explanation
In a semiconductor, at 0 K all the electrons are in the valence band and no electrons are there in the conduction band. At 0 K there are no free electrons but the number of electrons increases with the increase in temperature. As the temperature increases electrons…
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