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+// final flux = 0.8*initial flux
+Ia1 = 73; //initial armature current (in amps)
+Vt = 230; //(in volts)
+Ra = 0.188; //armature circuit resistance
+n1 = 1150; //initial rotor speed (in rpm)
+Ea1 = 216.3; //initial armature voltage
+
+Ia2 = (1/0.8)*Ia1 ; //final armature current
+Ea2 = Vt - (Ia2*Ra); //final armature voltage
+
+n2 = (Ea2/Ea1)*(1/0.8)*n1; //final rotor speed
+
+disp(n2,"final rotor speed(in rpm) = ") \ No newline at end of file