Question

In forward bias, the width of potential barrier in a p-n junction diode 

(a) remains constant 

(b) decreases 

(c) increases 

(d) first (a) then (b)

Answer 1

The correct option is (b) decreases.

Explanation:

In forward biasing, the conduction across p-n junction takes place due to migrations of majority carriers (i.e. electrons from n-side to p-side and holes from p-side to n-side). hence the size of depletion region decreases.