With the help of circuit diagram, explain the V-1 characteristics of p-n junction diode in forward biasing.

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Solution

Referring to the characteristic curve,
The VI characteristic curve of p-n junction diode in forward biased is non linear.
The current first increases slowly,almost negligibly,till the voltage across the diode crosses a certain value.
After the characteristic voltage,the diode current increases significantly,even for a very small increase in the diode bias voltage.This voltage is called THRESHOLD VOLTAGE or CUT-IN voltage.

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