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+//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex10_4.sce
+
+clc;
+clear;
+
+f=50;
+p=4;
+V=400;
+E2=190;
+R1=0.5;
+X1=2.5;
+R2=0.06;
+X2=0.3;
+
+printf("\n (a)")
+Ns=(120*f)/p;
+printf("\n  Synchronous speed=%d r.p.m \n",Ns)
+
+printf("\n (b)")
+s=(R2/X2)*100;
+printf("\n  Slip at which maximum torque occurs=%d percentage \n",s)
+
+printf("\n (c)")
+E=E2/sqrt(3);
+Ir=(s*E)/(sqrt(2)*R2*100);
+pf=1/sqrt(2);
+Pi=sqrt(3)*E2*Ir*pf;
+P0=(1-s/100)*Pi;
+Tm=Pi/(2*%pi*Ns/60);
+printf("\n  Maximum Torque=%3.2f synchronous watt \n",Tm)
+
+printf("\n (d)")
+Tfl=(1/2)*Tm;
+//(2/1)=(R2^2+sf^2*X2^2)/(2*X2*R2*sf)
+//From this equation we get sf^2-0.8*sf+0.04=0;
+a=1;
+b=-0.8;//a,b,c are coefficient values taken from the above second order equation
+c=0.04;
+sf=(-b-sqrt(b^2-(4*a*c)))/(2*a);
+sf_percentage=sf*100;
+Nf=Ns*(1-sf);
+Pf=2*%pi*(Nf/60)*Tfl;
+printf("\n  Full load torque=%3.2f synchronous watt",Tfl)
+printf("\n  Full load slip=%1.1f percentage",sf_percentage)
+printf("\n  Speed at full load=%d r.p.m",Nf)
+printf("\n  Power output=%2.2f kW \n",Pf/1000)
+//Answer vary dueto round off error
+
+printf("\n (e)")
+f_at_fullload=sf*f;
+printf("\n  The rotor frequency at full load=%1.1f Hz",f_at_fullload)