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diff --git a/1026/CH6/EX6.11/Example6_11.sce b/1026/CH6/EX6.11/Example6_11.sce
new file mode 100755
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+++ b/1026/CH6/EX6.11/Example6_11.sce
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+//chapter6,Example6_11,pg 124
+
+ni=2.5*10^13
+
+e=1.6*10^-19
+
+un=3900
+
+up=1900
+
+sigin=ni*e*(un+up)//intrinsic conductivity
+
+//1 donor atom/10^8 Ge atom dropped
+
+rhoGe=4.42*10^22//no. of Ge atom/cc
+
+Nd=rhoGe/10^8
+
+sigex=Nd*e*un//extrinsic conductivity
+
+printf("extrinsic conductivity\n")
+
+printf("sigex=%.4f ohm cm",sigex)
+\ No newline at end of file