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diff --git a/3775/CH2/EX2.9/Ex2_9.sce b/3775/CH2/EX2.9/Ex2_9.sce
new file mode 100644
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+//Ex 2.9 page 72
+
+clc;
+clear;
+close;
+
+Vf1=1;// V
+If1=0;//A
+Vf2=1.9;// V
+If2=60;//A
+IT=20*%pi;// A
+// PAV = 1/T*integrate(VT*IT,0,T)*dt = ITAV+0.015*IRMS**2
+ITAV=IT/%pi;//A
+ITRMS=IT/2;// A
+dt=ITAV+0.015*ITRMS**2;// W
+printf('Average power loss = %.1f W',dt)
+