Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following statements about semiconductors and p-n junctions are correct?
A
In a p-n junction, a depletion layer is formed due to immobile ion cores.
B
A semiconductor's energy gap can only be less than 0.2 eV.
C
The barrier in a p-n junction increases when a forward bias is applied.
D
The conduction band in semiconductors is always completely filled with electrons.
Correct Answer
Option A
Detailed Explanation
Statement A is correct as it describes the formation of the depletion layer in a p-n junction. Statement B is incorrect; semiconductors have energy gaps ranging from 0.2 eV to 3 eV. Statement C is incorrect; in forward bias, the barrier decreases. Statement D is also incorrect; the conduction band in semiconductors can be partially filled.
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