Question

A p-n junction diode is reverse biased. Then

• A. more current flows.
• B. the barrier potential decreases.
• C. the barrier potential increases,
• D. resistance offered is low.

Answer 1

Answer: (C)

the barrier potential increases,

The width of the depletion layer in a p-n junction diode increases in reverse bias as charge carriers are swept into battery terminals, holes from p-type into negative terminal and electrons from n-type into positive terminal. Due to large number of ions in depletion region, its potential increases.