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+//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex8_13.sce.
+
+clc;
+clear;
+Il=2;
+Z=864;
+If=0.6;
+V=220;
+Ra=0.8;
+a=2;
+p=2;
+phi=5.4e-3;
+T=25;
+
+Ia=Il-If;
+E1=V-(Ia*Ra);
+n1=(E1*a)/(2*Z*phi*p);
+N1=n1*60;
+printf("\n  Motor speed at no load=%4.0f r.p.m \n",N1)
+
+Ia=(T*a*%pi)/(p*phi*Z);
+Il=Ia+If;
+printf("\n  Motor current at full load torque=%2.3f A \n",Il)
+E2=V-(Ia*Ra);
+n2=(E2*a)/(2*Z*phi*p);
+N2=n2*60;
+printf("\n  Motor speed at full load=%4.0f r.p.m \n",N2)
+
+speed_reg=((N1-N2)/N2)*100;
+printf("\n  Speed regulation=%1.3f percentage",speed_reg)
+//There is a error in the regulation calculation in the book 
+//The book answer 9.95% is wrong