A diode shows variation in electric current passing through it when the biasing voltage is varied. V–I characteristics of the diode have been studied separately for both forward bias and reverse bias.
(i) Forward bias: The circuit diagram for a p-n diode in forward bias is shown in Fig. 8.22.
Figure 8.22 Circuit for forward biased p-n diode
By varying the rheostat contact, the voltage applied to the diode can be slowly increased. The voltage applied across the diode can be recorded with a voltmeter connected in parallel to the diode. To control the flow of current through the diode, a resistor R is connected ...