NEET2013Physics-Semiconductors
NEET 2013 Physics p-n Junction MCQ Question
Type: MCQ-conceptual-Medium-Class 12
In an unbiased p-n junction, holes diffuse from the p-regions to n-region because of:
A
The attraction of free electrons of n-region
B
The higher hole concentration in p-region than that in n-region
C
The higher concentration of electrons in the n-region than that in the p-region
D
The potential difference across the p-n junction
Correct Answer
Option B
Detailed Explanation
Diffusion occurs due to the concentration gradient, with holes moving from high concentration in the p-region to low concentration in the n-region.
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