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+//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex8_15.sce.
+
+clc;
+clear;
+P_in_HP=37.5;
+V=220;
+N=535;
+Ra=0.086;
+Ia1=140;
+I=200;
+
+E=V-(Ia1*Ra);
+R=(V+E)/I;
+R_ext=R-Ra;
+P=(P_in_HP)*736;
+omega=(2*%pi*N)/60;
+FL_T=P/omega;
+initial_braking_T=FL_T*(I/Ia1);
+Ia2=(V+(E/2))/R;
+halfspeed_braking_T=FL_T*(Ia2/Ia1);
+printf("\n  Armature circuit resistance=%1.2f ohm \n",R)
+printf("\n  The external resistance=%1.3f ohm \n",R_ext)
+printf("\n  Initial braking torque=%3.1f Nm \n",initial_braking_T)
+printf("\n  Braking torque at half speed=%3.1f Nm \n",halfspeed_braking_T)
+//Answer vary due to roundoff error