clear;
clc;
printf("\nEx7.1\n");
//page no.-205
//given
mu1=0.36;............//MOBILITY OF ELECTRONS IN m^2/volt-sec
mu2=0.17;............//MOBILITY OF HOLES IN m^2/volt-sec
e=1.6*10^-19;........//charge in coulamb
n=2.5*10^19;.........//density of electron & holes per m^3
sigma=n*e*(mu1+mu2)...//total conductivity in mho/metre

printf("\ntotal conductivity is 2.12 mho/metre\n");