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clear;
clc;
printf("\nEx-6.14\n");
//page no.-190
//given
v=10^6;.......//avg velocity in m.s
rho=1.673*10^-8;..//resistivity in ohm m
n0=8.48*10^28;.........//no. of electrons per unit vol
e=1.6*10^-19;......//charge in C
m=9.11*10^-31;......//mass of e in kg
tau=m/(no*e^2*rho)........//mean collission time in s
printf("\nmean collision time is 2.51*10^-14 s\n");
lambda=v*tau............//mean free path in m
printf("\nmean free path 2.51*10^-8 m");
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