Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 41
42. A depletion layer consists of
(a) electrons
(b) protons
(c) mobile ions
(d) immobile ions
[1999]
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Answer:
Correct Answer: 42. (d)
Solution:
- (d) Depletion layer is formed by diffusion of holes and electrons from $p$-type semiconductor to n-type semiconductor and vice-versa. Hence, donor and acceptor atom get positive and negative charge leading to formation of $p-n$ junction. The donor and acceptor are immobile.
