1 files changed, 8 insertions, 0 deletions
diff --git a/3020/CH18/EX18.4/ex18_4.sce b/3020/CH18/EX18.4/ex18_4.sce
new file mode 100755
index 000000000..f2e03ea0e
--- /dev/null
+++ b/3020/CH18/EX18.4/ex18_4.sce
@@ -0,0 +1,8 @@
+clc;
+clear all;
+ue=0.13;//electon mobility in m^2/V*s
+uh=0.05;//hole mobility in m^2/V*s
+ni=1.5e16;//intrisic carrier concentration in m^-3
+e=1.6e-19;//charge of electron
+sigma=ni*e*(ue+uh);//conductivity of germanium
+disp('ohm^-1 m^-1',sigma,'conductivity of semiconductor is:')