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clear//
//Variables
VCC = 12.0 //Source voltage (in volts)
RE = 100.0 //Emitter Resistance (in ohm)
RC = 1.0 //Collector Resistance (in kilo-ohm)
R1 = 25.0 //Resistance (in kilo-ohm)
R2 = 5.0 //Resistance (in kilo-ohm)
VBE = 0.7 //Emitter-to-Base Voltage (in volts)
betamin = 50.0 //Common emitter current gain (min)
betamax = 150.0 //Common emitter current gain (max)
//Calculation
Vth = VCC * (R2 /(R1 + R2)) //Thevenin's voltage (in volts)
Rth = R1 * R2 / (R1 + R2) * 10**3 //Thevenin's equivalent resistance (in ohm)
IE1 = (Vth - VBE)/(RE + Rth/betamin) //Emitter current (in Ampere)
IE2 = (Vth - VBE)/(RE + Rth/betamax) //Emitter current (in Ampere)
perc_change = (IE2 - IE1) / IE1 * 100 //Percentage change in the value of beta
//Result
printf("\n The percentage change in collector current is %0.1f .",perc_change)
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