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+// Example 12.2
+// Computation of (a) No load voltage (b) Voltage regulation
+// (c) Resistance setting of rheostat necessary to obtain rated voltage 
+// at rated conditions
+// Page No. 487
+
+clc;
+clear;
+close;
+
+// Given data
+P=300000;               // Shunt generator power rating
+VT=240;                 // Shunt generator voltage rating
+Ra=0.00234;             // Armature winding resistance
+RIP=0.00080;            // Resistance of interpole winding
+Fnet=5100;              // Net mmf
+Vnl=255;                // No load voltage
+Vrated=240;             // Rated voltage
+Nf=1020;                // Turns per pole
+Vf=120;                 // Source that separately excites the generator
+If=5.69;
+Rf=18.1;
+
+// (a) No load voltage
+Ia=P/VT;               // Armature current
+Ea=VT+Ia*(Ra+RIP);     // Armature emf
+Ff=Fnet/(1-0.121);
+
+
+// (b) Voltage regulation
+VR=(Vnl-Vrated)*100/Vrated; 
+
+// (c) Resistance setting of rheostat necessary to obtain rated voltage at rated conditions
+If=Ff/Nf;
+Rrheo=(Vf/If)-Rf; // Rheostat setting
+
+
+// Display result on command window
+printf("\n No load voltage = %0.0f V ",Vnl);
+printf("\n Voltage regulation = %0.2f Percent ",VR);
+printf("\n Resistance setting of rheostat necessary = %0.0f Ohm",Rrheo);