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+// Example 2.3
+// Computation of (a) Exciting current and its quadrature components 
+// (b) Equalizing magnetic reactance and equivalent core loss resistance
+// (c) Magnetizing current (d)repeat (a) and (b) for the transformer in the 
+// step up mode
+//Page No. 44
+
+clc;
+clear;
+close;
+
+Fp=0.210;               // Power factor
+Pcore=138;              // Active power
+VT=2400;                // Voltage applied to primary
+VT1=240;                // 240-V primary voltage -- Second case
+
+
+// (a)Exciting current and its quadrature components
+Theta=acosd(Fp);         // Angle
+Thetai=-Theta;           // As phase angle of applied voltage is zero
+Ife=Pcore/VT;            // Exciting current
+I0=Ife/Fp;               // Quadrature component
+Im=tand(Thetai)*Ife;     // Quadrature component
+Im=Im*-1;
+      
+
+// (b) Equalizing magnetic reactance and equivalent core loss resistance
+XM=VT/Im;                  // Magnetic reactance
+Rfe=VT/Ife;                // Core-loss resistance
+XM=XM/1000;
+Rfe=Rfe/1000;
+//(c) Magnetizing current
+Ife1=Pcore/VT1;            // Exciting current
+I01=Ife1/cosd(Thetai);
+IM1=tand(Thetai)*Ife1;     // Quadrature component
+IM1=IM1*-1;
+
+//(d) repeat (a) and (b) for the transformer in the step up mode
+XM1=VT1/IM1;              // Magnetizing reactance
+Rfe1=VT1/Ife1;            // Core-loss resistance
+
+
+
+//Display result on command window
+printf("\n Exciting current = %0.4f A ",Ife);
+printf("\n Exciting current quadrature component 1 = %0.4f A ",I0);
+printf("\n Exciting current quadrature component 2 = %0.3f A ",Im);
+printf("\n Equivalent magnetic reactance = %0.2f kOhm ",XM);
+printf("\n Equivalent core loss resistance = %0.1f kOhm ",Rfe);
+printf("\n Exciting current in step-up mode = %0.3f A ",Ife1);
+printf("\n Exciting current in step-up mode quadrature component 1 = %0.2f A ",I01);
+printf("\n Exciting current in step-up mode quadrature component 2 = %0.2f A ",IM1);
+printf("\n Equivalent  magnetic reactance in the step up mode  = %0.1f Ohm ",XM1);
+printf("\n Equivalent core loss resistance in the step up mode = %0.1f Ohm ",Rfe1);