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//Example number 7.4, Page number 147
clc;clear;
close;
//Variable declaration
alpha_e=10**-40; //polarisability(Fm**2)
N=3*10**28; //density of atoms
epsilon0=8.85*10**-12;
//Calculation
x=N*alpha_e/epsilon0;
epsilonr=(1+(2*x))/(1-x); //dielectric constant(F/m)
//Result
printf("dielectric constant is %.3f F/m",epsilonr)
//answer in the book is wrong
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