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+//Exa 9.11
+clc;
+clear;
+close;
+//Given data :
+v2byv1=25/23.25;//ratio(By Kirchoff law)
+v3byv1=1.65/1.1625;//ratio(By Kirchoff law)
+Vbyv1=1+v2byv1+v3byv1;//ratio(Final voltage between line conductor & earth)
+v1byV=1/Vbyv1;//ratio
+v2byV=v2byv1*v1byV;//ratio
+v3byV=v3byv1*v1byV;//ratio
+eff=1/3/v3byV*100;//string efficiency in %(V/3/v3)
+disp(eff,"String efficiency in % is ");