Question

When forward bias is applied to a p-n junction, then what happens to the potential barrier $V_B$, and the width of charge depletion region?

• A. $V_B$ increases, x decreases
• B. $V_B$ decreases, x increases
• C. $V_B$ increases, x increases
• D. $V_B$ decreases, x decreases

Answer 1

The correct option is D

$V_B$ decreases, x decreases

Due to forward bias, the potential of p-side is raised and hence the height of the potential barrier decreases. As a result of this, the width of the depletion region is also reduced.