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diff --git a/3673/CH9/EX9.a.11/Example_a_9_11.sce b/3673/CH9/EX9.a.11/Example_a_9_11.sce
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+//Example_a_9_11 page no:410
+clc;
+V=400;
+P=2000;
+f=50;
+pf=0.8;
+Vph=V/sqrt(3);
+Il=P/(sqrt(3)*V*pf);
+Iph=Il;
+pi=acosd(pf);
+sin_pi=sind(pi);
+Zph=Vph/Iph;
+Rph=Zph*pf;//Rph varies slightly with text book because Zph is rounded off in text book
+Xph=Zph*sin_pi;//Xph varies slightly with text book because Zph is rounded off in text book
+disp(Rph,"the resistance of each phase is (in ohm)");
+disp(Xph,"the reactance of each phase is (in ohm)");