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diff --git a/1802/CH5/EX5.12/Exa5_12.sce b/1802/CH5/EX5.12/Exa5_12.sce
new file mode 100755
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+++ b/1802/CH5/EX5.12/Exa5_12.sce
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+//Exa 5.12
+clc;
+clear;
+close;
+//Given Data :
+format('v',8);
+R=2;//in ohm
+X=3;//in ohm
+VR=10*1000;//in volt
+P=1000*10^3;//in watt(power delivered)
+cos_fir=0.8;//unitless
+I=P/(VR*cos_fir);//in Ampere
+Vs=sqrt((VR*cos_fir+I*R)^2+(VR*sqrt(1-cos_fir^2)+I*X)^2);//in volt
+Reg=(Vs-VR)*100/VR;//in %
+disp(Reg,"% Regulation : ");
+losses=I^2*R;//in watts
+Pr=P*cos_fir;//in wats(Receiving end power)
+Psend=Pr+losses;//in watts
+Eff=Pr*100/Psend;//unitless
+disp(Eff,"Transmission efficiency (in %) :");
+\ No newline at end of file