Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 12

12. In an unbiased $p-n$ junction, holes diffuse from the p-region to n-region because of

[NEET Kar. 2013]

(a) the potential difference across the p-n junction

(b) the attraction of free electrons of n-region

(c) the higher hole concentration in p-region than that in n-region

(d) the higher concentration of electrons in the $n$-region than that in the p-region

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Answer:

Correct Answer: 12. (c)

Solution:

  1. (c) In p-region of p-n junction

holes concentration $>$ electrons concentration and in $n$-region of $p-n$ junction.

electrons concentration $>$ holes concentration.