1. Identify the figure, which shows the correct direction of ow of charges.

Question

Forward biased pn junction diodes are shown in the figure.

1. Identify the figure, which shows the correct direction of ow of charges. 

2. What do you mean by barrier potential and depletion region of a pn junction? 

3. When forward bias is applied to a p-n junction, what happens to the potential barrier and the width of depletion region.

Answer 1

1.

2. The potential developed across the junction, which tends to prevent the movement of electron from the n region into the p region, in semiconductor is called a barrier potential. 

The space charge region on either side of the junction at which there is no free charge carriers is known as depletion region.

3. The potential barrier decreases and depletion region gets reduced.