CUET · PHYSICS · PYQ PAPER 2025
In an intrinsic semiconductor at room temperature ;
- A the number of free electrons are much larger than the number of holes
- B the number of holes are much larger than the number of free electrons
- C the number of free electrons and the number of holes are equal and non-zero
- D the number of free electrons and the number of holes are zero
Answer & Solution
Correct Answer
(C) the number of free electrons and the number of holes are equal and non-zero
Step-by-step Solution
Detailed explanation
The number of free electrons and the number of holes are equal and non-zero. Equal Numbers: Free electrons are generated only when thermal energy is sufficient to break covalent bonds. Every time an electron breaks free to enter the conduction band, it leaves behind a vacancy in…
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