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// Example 2.3
// Calculation of potential difference
// page no 480
clc;
clear;
close;
// Given data
na=10^24; // Accepter impurity level
nd=10^22; // Donor impurity level
ni=2.4*10^19; // Intrinsic electron
T=290; // Room temperature
e=1.602*10^-19; // Electric charge
K=1.38*10^-23; // Boltzmann constant
//Potential difference
V=(K*T)/e*(log(na*nd/(ni)^2));
//Display result on command window
printf("\n Potential difference (V) = %0.2f ",V);
// The potential difference varies with the variation of Na, Nd and ni
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