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diff --git a/2444/CH1/EX1.18/ex1_18.sce b/2444/CH1/EX1.18/ex1_18.sce
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+// Exa 1.18
+clc;
+clear;
+close;
+format('v',7)
+// Given data
+E_CminusE_F = 0.24;// in eV
+T = 300;// in K
+T1 = 350;// in K
+// E_CminusE_F = K*T*log(n_c/N_D) (i)
+// E_CminusE_F1 =K*T1*log(n_C/N_D) (ii)
+// From eq(i) and (ii)
+E_CminusE_F1 = E_CminusE_F*(T1/T);// in eV
+disp("The new position of the Fermi level lies "+string(E_CminusE_F1)+" eV below the conduction band")
+