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//Ex18_1 Pg-901
clc
Vs=12 //supply voltage in V
Vd=2 //forward bias voltage in V
Id=20*10^(-3) //forward bias current
Rs=(Vs-Vd)/Id //source resistor
printf("Source resistance = %.0f ohm \n",Rs)
P=Id^2*Rs //power
printf(" Wattage rating = %.1f mW",P*1e3)
disp("Therefore a standard size 0.25 watt = 250mW resistor is required")
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