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+//Ex 3.14 page 127
+
+clc;
+clear;
+close;
+
+n=3;// no. of phase
+R=60;// ohm
+Vs=400;// V
+alpha = 30;// degree
+
+Vm=Vs*sqrt(2);// V
+Vo=3*Vm/%pi*cos(alpha*%pi/180);// V
+Io=Vo/R;// A
+Is=Io*sqrt(2/3);// A
+P=Io**2*R;// W
+pf=P/sqrt(3)/Vs/Is;// power factor
+
+printf('\n Average load voltage = %.3f V',Vo)
+printf('\n Average load current = %.1f A',Io)
+printf('\n input power factor = %.4f',pf)
+// Note : Ans in the textbook is wrong as in calculation for pf Io is used in place of Is