Biasing, Forward, Reverse Biasing

 Biasing means the electrical supply or potential difference is connected to the semiconductor device. 

The potential difference is of two types namely – forward bias and the reverse bias.

One of the major difference between the forward and the reverse biasing is that in forward biasing the positive terminal of the battery is connected to the p-type semiconductor material and the negative terminal is connected to the n-type semiconductor material. 

Whereas in reverse bias the n-type material is connected to the positive terminal of the supply and the p-type material is connected to the negative terminal of the battery.

The forward bias reduces the potential barrier of the diode and establishes the easy path for the flow of current. While in reverse bias the potential difference increases the strength of the barrier which prevents the charge carrier to move across the junction. The reverse bias provides the high resistive path to the flow of current, and hence no current flows through the circuit.