SOLUTION

⇒ Bias is a potential applied to a PN junction to obtain a desired mode of operation.

⇒ This potential is used to control the width of the depletion layer.

⇒ Forward bias is a potential used to reduce the resistance of a PN junction.

⇒ A forward biased PN junction has a minimum depletion layer width and junction resistance of few ohms.

⇒ Reverse bias is a potential used to increase the resistance of a PN junction A reverse-biased PN junction has a maximum depletion layer width and junction resistance.