initial commit / add all books

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+// Exa 4.21

+format('v',7)

+clc;

+clear;

+close;

+// Given data

+beta_dc = 90;

+// The base current,

+I_C = 15;// in mA

+I_C = I_C * 10^-3;// in A

+I_B = I_C/beta_dc;// in A

+I_B=I_B*10^6;// in µA

+disp(I_B,"The base current in µA is");

+I_B=I_B*10^-6;// in A

+// The emitter current,

+I_E = I_C + I_B;// in A

+I_E = I_E * 10^3;// in mA

+disp(I_E,"The Emitter current in mA is");

+alpha_dc = beta_dc/(1+beta_dc);

+disp(alpha_dc,"The value of alpha_dc is");

+

+// Note: There is printing mistake in the book in this example.