initial commit / add all books

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+
+                // Examle 16.7
+
+Il=100;                  // Series field current
+Rse=0.1;                 // Resistance series field
+Vse=Rse*Il;              // Voltage drop across series field (Vse)
+disp('Voltage drop across series field (Vse) = '+string(Vse)+' Volt');
+
+V=250;                   // Supply voltage
+Vsh=V+Vse;               // Voltage drop across Shunt field (Vsh)
+disp('Voltage drop across Shunt field (Vsh) = '+string(Vsh)+' Volt');
+
+Rsh=130;                 // Resistance
+Ish=Vsh/Rsh;             // Shunt field Current (Ish)
+disp(' Shunt field Current (Ish) = '+string(Ish)+' Amp');
+
+Ia=Il+Ish;               // Armature Current (Ia)
+disp('Armature Current (Ia) = '+string(Ia)+' Amp');
+
+Ra=0.1;                  // Armature resistance
+dro=2;                   // Brush-drop
+Eg=V+Vse+(Ia*Ra)+dro;    // Generated emf (Eg)
+disp('Generated emf (Eg) = '+string(Eg)+' Volt');
+
+
+
+         // p 638    16.7
+