Question

What is meant by a forward biased pn- junction ?​

Answer 1

Answer : -

(1) In an electric circuit, the p-region is connected to the positive terminal and the n-region is connected to the negative terminal of an external voltage source,

(2) The external voltage effectively opposes the built-in potential difference across the junction. The width of the potential barrier is thus reduced.

(3) The negative charge carriers, i.e., electrons from the n-region as well as the positive charge carriers, i.e., holes in the p-region are forced towards the junction.

(4) Both the charge carriers thus find it easy to overcome the barrier and contribute to the electric current

(5) This arrangement of a pn-junction in an electric circuit is called the forward bias.