initial commit / add all books

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diff --git a/2243/CH11/EX11.11/Ex11_11.sce b/2243/CH11/EX11.11/Ex11_11.sce
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+clc();

+clear;

+//Given :

+ni = 1.5*10^16; // ni for Si in m^-3

+mue = 0.135; // mobility of free electrons in m^2/Vs

+muh = 0.048; // mobility of holes in m^2/Vs

+Nd = 10^21; // phosphorus atoms/m^3

+e = 1.6*10^-19;// charge of an electron in C

+//(a) 

+n = Nd; // electrons/m^3

+//(b)

+p = ni^2/Nd; // holes/m^3

+//(c)

+sigma = e*(n*mue + p*muh); // conductivity in mho m^-1

+rho = 1/sigma; // resistivity in ohm m

+

+printf("Major carrier concentration  = %.1f x 10^21 electrons/m^3 \n",n*10^-21);

+printf("Minor carrier concentration  = %.2f x 10^11 holes/m^3\n",p*10^-11);

+printf("Resistivity  = %.3f ohm m",rho);