initial commit / add all books

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diff --git a/431/CH3/EX3.16/EX3_16.sce b/431/CH3/EX3.16/EX3_16.sce
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+//Calculating secondary voltage and voltage regulation

+//Chapter 3

+//Example 3.16

+//page 218

+clear;

+clc; 

+disp("Example 3.16")

+kVA=10;                //rating of the transformer

+V1=2000;                //primary voltage in volts

+V2=400;                //secondary voltage in volts

+R1=5.5;                //primary voltage in ohms

+R2=0.2;                //secondary voltage in ohms

+X1=12;                  //primary reactance in ohms

+X2=0.45;                //secondary reactance in ohms

+//assuming  (V1/V2)=(N1/N2)

+Re=R2+(R1*(V2/V1)^2);

+printf("equivalent resistance referred to the secondary=%fohms",Re);

+Xe=X2+(X1*(V2/V1)^2);

+printf("equivalent reactance referred to the secondary=%fohms",Xe);

+Ze=sqrt(Re^2+Xe^2);

+printf("equivalent impedance referred to the secondary=%fohms",Ze);

+phi=acosd(0.8);

+Vl=374.5;

+printf("\nVoltage across the full load and 0.8 p.f lagging=%fV",Vl);

+reg=((V2-Vl)*100)/Vl;

+printf("\npercentage voltage regulation=%f percent",reg);

+

diff --git a/431/CH3/EX3.16/resultEX3_16.txt b/431/CH3/EX3.16/resultEX3_16.txt
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+  

+ Example 3.16   

+equivalent resistance referred to the secondary=0.420000ohmsequivalent reactance referred to the secondary=0.930000ohmsequivalent impedance referred to the secondary=1.020441ohms

+Voltage across the full load and 0.8 p.f lagging=374.500000V

+percentage voltage regulation=6.809079 percent 
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