From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 3020/CH18/EX18.9/ex18_9.sce | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100755 3020/CH18/EX18.9/ex18_9.sce

(limited to '3020/CH18/EX18.9')

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
-- 
cgit