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// Exa 7.7
clc;
clear;
// Given
Gf = 2 ; // Gauge factor of strain gauge
S = 1000; // Stress in kg/cm^2
E = 2*10^6; // Youngs Modulus in kg/cm^2
// Solution
e = S/E; // strain
dR_R = e*Gf; // change in resistance
// Gf = 1+2u;
// Therefore
u = (Gf-1)/2; // poissons ratio
printf('The percentage change in resistance of strain gauge = %.1f \n',dR_R*100);
printf(' Poissons ratio = %.2f \n',u);
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