1 files changed, 11 insertions, 0 deletions
diff --git a/3020/CH18/EX18.9/ex18_9.sce b/3020/CH18/EX18.9/ex18_9.sce
new file mode 100755
index 000000000..bb0919eff
--- /dev/null
+++ b/3020/CH18/EX18.9/ex18_9.sce
@@ -0,0 +1,11 @@
+clc;
+clear all;
+m0=9.1e-31;//mass of electron
+h=6.626e-34;//plank constant
+k=1.38e-23;//boltzman constant
+Eg=0.7;//bandgap energy in eV
+e=1.6e-19;//charge of electron
+T=300;//temperature in K
+ni=2*((2*%pi*m0*k*T/(h^2))^1.5)*exp((-Eg*e)/(2*k*T))
+disp('m^-3',ni,'intrinsic concentration is:')
+// slight variation in answer as compared to textbook... checked in calculator