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+// Exa 7.5
+
+clc;
+clear;
+
+// Given
+
+L = 0.1 ; // Initial length of wire in m
+R = 120; // Initial resistance of wire in ohms
+delta_L =  0.1*10^-3;// change in length of wire in m
+delta_R = 0.21; // change in resistance of wire in ohms
+
+// Solution
+
+e = delta_L/L;
+G = (delta_R/R)/e;
+
+printf(' The gauge factor of device = %.2f \n',G);