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+// Example 4.1
+// Computation for percentage increase in conductivity per degree rise in temperature//
+// Page no.87
+
+clc;
+clear;
+close;
+
+//Given data ;
+T=300;
+EGO=0.785;//forbidden or bandgap energy of germanium at 0 degree K
+k=8.62*10^-5;
+
+
+//Calculation for increase in conductivity per degree rise in temperature//
+conduct_per_temp=(3/(2*T))+(EGO/(2*k*T^2));
+
+//Calculation for percentage increase in conductivity per degree rise in temperature//
+P1=conduct_per_temp*100;
+
+//Thus the conductivity of the intrinsic germanium increases by 5.56 percent per degree kelvin rise in temperature//
+
+//Displaying the result in command window
+printf('\n Increase in conductivity per degree rise in temperature = %0.4f/degree K',conduct_per_temp);
+printf('\n \n percentage increase in conductivity per degree rise in temperature = %0.2f percent',P1);
+
+
+//Answers are varying due to round off error//