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diff --git a/2102/CH2/EX2.24/exa_2_24.sce b/2102/CH2/EX2.24/exa_2_24.sce
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+// Exa 2.24
+clc;
+clear;
+close;
+// Given data
+rho= 0.5;// in 
+miu_n= 0.39;// in m^2/v-sec
+miu_p= 0.19;// in m^2/v-sec
+q=1.6*10^-19;// in C
+sigma= 1/rho;// in (Ωm)^-1
+// Formula sigma= q*ni*(miu_n+miu_p)
+ni= sigma/(q*(miu_n+miu_p));// in /m^3
+disp(ni,"The intrinsic carrier concentration of germanium in /m^3 is : ")