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diff --git a/3830/CH7/EX7.8/Ex7_8.sce b/3830/CH7/EX7.8/Ex7_8.sce
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+// Exa 7.8
+
+clc;
+clear;
+
+R = 200; // strain gauge resistance in Ohms
+G = 2.5; // Gauge factor
+RL = 400; // load resistance in Ohms
+V = 24; // input voltage in volts
+S = 140; // applied stress in mgf/m^2
+Y = 200; // Modulus of elasticity in GN/m^2
+
+// Solution
+
+V_normal = V*(R/(R+RL));
+
+printf('Voltage across strain gauge = %d V \n',V_normal);
+e = (S*10^-3)/Y;
+// Strain e =   dell_L/L
+//dell_R/R = G* dell_L/L;
+// so,
+dell_R = R*G*e;
+
+
+//strain gauge under strained condition
+V_strained = (R+dell_R) * V/(R+dell_R+RL);
+printf(' Voltage across strain gauge under strained condition = %.4f ohms \n',V_strained);
+
+dif = V_normal - V_strained;
+printf(' Change in output voltage = %.2f mV \n',abs(dif*10^3));