NEET Physics (general) MCQ Question
Which of the following statements regarding a p-n junction is correct?
A p-n junction allows current to flow when reverse biased.
Holes in the p-region diffuse to the n-region due to a higher concentration.
A forward bias increases the potential barrier of a p-n junction.
The formation of a p-n junction requires trivalent doping.
Correct Answer
Detailed Explanation
Holes diffuse from the p-region to the n-region because the concentration of holes is higher in the p-region than in the n-region, which aligns with the explanation in the NCERT context. Option A is incorrect because current flows when forward biased, not reverse. Option C is false as forward bias lowers the potential barrier. Option D is inaccurate since p-n junction formation involves pentavalent doping for n-type and trivalent for p-type.
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