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//===========================================================================
//chapter 11 example 7
clc;
clear all;
//variable declaration
R1 = 1.0; //resistace in Ω
V1 = 0.8-%i*0.75; //voltage drop across the resistance in volt
V2 = 1.2+%i*0.3; //voltage across the coil in volt
//calculations
I = V1/R1; //current through coil in A
x = (atan(imag(V1)/real(V1)))*180/%pi;
y = (atan(imag(V2)/real(V2)))*180/%pi;
phi = y-x;
a =sqrt(((real(V2))^2)+((imag(V2))^2));
b =sqrt(((real(I))^2)+((imag(I))^2));
V3 = a*cos(phi*%pi/180); //resistive drop the coil in V
P = a*b*cos(phi*%pi/180); //power loss in the coil in W
//result
mprintf("iron loss in the coil =%3.3f watt",P);
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