MHT CET · Physics · Semiconductors
In an extrinsic n-type semiconductor, the free electrons donated by the impurity atoms occupy energy levels in
- A the conduction band.
- B the valance band.
- C the band gap and are close to conduction band.
- D the band gap and are close to valance band.
Answer & Solution
Correct Answer
(C) the band gap and are close to conduction band.
Step-by-step Solution
Detailed explanation
- (C) the band gap and are close to the conduction band: This is the correct answer. The free electrons donated by the impurity atoms occupy energy levels in the band gap, and these levels are close to the conduction band. When the temperature is increased, these electrons can easily gain enough energy to jump into the conduction band.
- (D) the band gap and are close to the valence band: This is incorrect. Donor levels are closer to the conduction band, not the valence band.
Conclusion:
The correct answer is: (C) the band gap and are close to conduction band.
- (D) the band gap and are close to the valence band: This is incorrect. Donor levels are closer to the conduction band, not the valence band.
Conclusion:
The correct answer is: (C) the band gap and are close to conduction band.
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