blob: 68e8666c5b1d370f420fc46b14b2dfa01ef385f0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
clear
//
//
//
//Variable declaration
Na=6.023*10**26 //avagadro number
e=1.602*10**-19
d=8960 //density
N=1 //number of free electrons
w=63.54 //atomic weight
i=10 //current(ampere)
m=9.1*10**-31
rho=2*10**-8 //resistivity(ohm m)
r=0.08*10**-2 //radius(m)
c=1.6*10**6 //mean thermal velocity(m/s)
//Calculation
A=%pi*r**2 //area(m**2)
n=Na*d*N/w
vd=i/(A*n*e) //drift speed(m/s)
tow_c=m/(n*e**2*rho)
lamda=tow_c*c //mean free path(m)
//Result
printf("\n drift speed is %0.1f *10**-5 m/s",vd*10**5)
printf("\n mean free path is %0.2f *10**-8 m",lamda*10**8)
printf("\n answer given in the book is wrong")
|
