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+// Scilab Code Ex6.1:: Page-6.19 (2009)
+clc; clear;
+T = 300;    // Temperature of pure semiconductor, K
+n_i = 2.5e+019; // Intrinsic carrier density, per metre square
+e = 1.6e-019;   // Charge on an electron, C
+mu_e = 0.39;    // Mobility of electrons, Sq.m/V/s
+mu_h = 0.19;    // Mobility of holes, Sq.m/V/s
+sigma_i = e*n_i*(mu_e+mu_h);    // Conductivity of intrinsic semiconductor at 300 K, mho/m
+rho_i = 1/sigma_i;  // Resistivity of intrinsic semiconductor at 300 K, ohm-m
+
+printf("\nThe resistivity of intrinsic semiconductor at 300 K = %4.2f ohm-m", rho_i);
+
+// Result 
+// The resistivity of intrinsic semiconductor at 300 K = 0.43 ohm-m