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+// using second approximation find load voltage
+// Electronic Principles
+// By Albert Malvino , David Bates
+// Seventh Edition
+// The McGraw-Hill Companies
+// Example 5-7, page 153
+
+clear;clc; close;
+
+// Given data
+Iz=20*10^-3;// zener current in amperes
+Rz=8.5;// zener resistance in ohms
+Vz=10;// breakdown voltage in volts
+
+// Calculations
+dVl=Iz*Rz;// change in load voltage in volts
+Vl=Vz+dVl;// load voltage  in  volts
+disp("Volts",Vl,"load voltage=")
+
+// Result
+// load voltage is 10.17 volts
diff --git a/317/CH5/EX5.7/example7.txt b/317/CH5/EX5.7/example7.txt
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+load voltage is 10.17 volts