Question

When a p-n junction diode is forward biased

(A) The barrier height and the depletion layer width both increase.

(B) The barrier height increases and the depletion layer width decreases.

(C) The barrier height and the depletion layer width both decrease.

(D) The barrier height decreases and the depletion layer width increases.

Answer 1

Correct option is : (C) The barrier height and the depletion layer width both decrease.

When p-n junction is forward biased:

• The barrier potential decreases.

• The depletion layer width decreases due to carrier injection.