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A linear model of a diode is shown in Fig. P1.21. where Rd is the forward resistance of the diode and Von is the voltage that turns the diode ON. To determine the resistance Rd and voltage Von, two voltage values are applied to the diode and the corresponding currents are measured. The applied voltage Vs and the measured current I are given in Fig. P1.21. The applied voltage and the measured current satisfy the linear equation Vs=IRd+Von. (a) Find the equation of the line for Vs as a function of I and determine the resistance Rd, and the voltage Von.
(b) Sketch the graph of Vs as a function of I. and clearly indicate the resistance Rd and the voltage Von on the graph.

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