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+//CHAPTER 11- SINGLE PHASE INDUCTION MOTOR
+//Examle 2
+
+disp("CHAPTER 11");
+disp("EXAMPLE 2");
+
+//VARIABLE INITIALIZATION
+P=4;              //numbre of poles
+f=60;             //frequency on Hz
+N_r=1710;         //rotor speed in rpm
+r=12.5;           //in ohms
+
+//SOLUTION
+
+N_s=(120*f)/P;
+
+//solution (a)
+disp("Solution (a)");
+S_f=(N_s-N_r)/N_s; 
+disp(sprintf("The slip in forward direction is %f %%",S_f*100));     
+r_f=0.5*(r/S_f);
+disp(sprintf("The forward effective rotor resistance is %f Ω",r_f));
+
+//solution (b)
+disp("Solution (b)");
+S_b=(N_s+N_r)/N_s; 
+disp(sprintf("The slip in backward direction is %f %%",S_b*100));    
+r_b=0.5*(r/S_b);
+disp(sprintf("The backward effective rotor resistance is %f Ω",r_b));
+
+//END
+
+