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clear//
//Variables
RL = 100.0 //Resistance (in ohm)
Vm = 300.0 //Maximum voltage (in volts)
P1 = 25.0 //Load power1 (in watt)
P2 = 80.0 //Load power2 (in watt)
//Calculation
Vdc = Vm / (2 * %pi) //dc voltage (in volts)
//When power is 25 watt
cosinealpha = (P1 * RL / Vdc**2)**0.5 -1 //cos of alpha
alpha = acos(cosinealpha) //Value of alpha (in radians)
//When power is 80 watt
cosinealpha1 = (P2 * RL / Vdc**2)**0.5 -1 //cos of alpha
alpha1 = acos(cosinealpha1) //Value of alpha (in radians)
//Result
printf("\n Angular firing control when load power P = 25 W is %0.2f degree.\nAngular firing control when load power P = 80 W is %0.2f degree.",alpha*180.0/%pi,alpha1*180.0/%pi)
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