1 files changed, 21 insertions, 0 deletions
diff --git a/3669/CH5/EX5.9/9.sce b/3669/CH5/EX5.9/9.sce
new file mode 100644
index 000000000..3d92be74d
--- /dev/null
+++ b/3669/CH5/EX5.9/9.sce
@@ -0,0 +1,21 @@
+
+//Variable declaration
+rho=1.54*10**-8;     //resistivity of metal(ohm m)
+n=5.8*10**28;     //number of free electrons(per m**3)
+e=1.602*10**-19;     //charge(c)
+m=9.11*10**-31;     //mass(kg)
+E=1*10**2;   //electric field(V/m)
+Kb=1.381*10**-23;    //boltzmann constant
+T=300;    //temperature(K)
+
+//Calculation
+tow=m/(n*e**2*rho);       //relaxation time(s)
+vd=e*E*tow/m;    //drift velocity(m/s)
+mew=vd/E;        //mobility(m**2/Vs)
+Vth=sqrt(3*Kb*T/m);    //thermal velocity(m/s)
+
+//Result
+printf('relaxation time is %0.3f  *10**-14 s   \n',(tow*10**14))
+printf('drift velocity is %0.3f    m/s \n',(vd))
+printf('mobility is %0.3f   *10**-2 m**2/Vs  \n',(mew*10**2))
+printf('thermal velocity is %0.3f   *10**5 m/s  \n',(Vth/10**5))
+\ No newline at end of file