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+//CHAPTER 7- SINGLE PHASE TRANSFORMER
+//Example 1
+
+disp("CHAPTER 7");
+disp("EXAMPLE 1");
+
+//VARIABLE INITIALIZATION
+I_0=10;                        //no load current in Amperes
+pf=0.25;                       //power factor
+v1=400;                        //in Volts
+f=50;                          //in Hertz
+
+//SOLUTION
+
+//solution (a)
+theta=acos(pf);         
+I_phi=I_0*sin(theta);         
+disp(sprintf("(a) The magnetizing component of no load current is %f A",I_phi));
+
+//solution (b)
+p_c=v1*I_0*pf;
+disp(sprintf("(b) The iron loss is %d W",p_c));
+
+//solution (c)
+N1=500;
+phi_m=v1/(sqrt(2)*%pi*f*N1);
+disp(sprintf("(c) The maximum value of flux in the core is %f mWb",phi_m*1000));
+
+//END
+