1 files changed, 13 insertions, 0 deletions
diff --git a/3020/CH17/EX17.4/ex17_4.sce b/3020/CH17/EX17.4/ex17_4.sce
new file mode 100755
index 000000000..93e8cdec4
--- /dev/null
+++ b/3020/CH17/EX17.4/ex17_4.sce
@@ -0,0 +1,13 @@
+clc;
+clear all;
+rho=2.7e3;//density of Al in Kg/m^3
+m=27;//atomic weight of Al
+to=1e-14;//relexation time in second
+Na=6.022e26;
+e=1.6e-19;
+x=3;//no of electrons per atom
+n=rho*Na*x/m;//no of electron available per m^3
+disp('m^-3',n,'no of electron available in Al is');
+me=9.1e-31;
+sigma=n*e*e*to/me;//conductivity of Al
+disp('ohm*m',sigma,'conductivity of Al is:')