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+//Example 9_12 page no:364
+clc;
+Zreal=4;
+Zimg=3;
+Vl=400;
+Il=12;
+Zph=sqrt(Zreal^2+Zimg^2);
+PF=Zreal/Zph;
+sinpi=0.6;
+Active_power=sqrt(3)*Vl*Il*PF;
+Reactive_power=sqrt(3)*Vl*Il*sinpi;
+Apparent_power=sqrt(3)*Vl*Il;
+disp(Active_power,"the active power is (in W)");
+disp(Reactive_power,"the reactive power is (in VAR)");
+disp(Apparent_power,"the apparent power is (in VA)");