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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 9: POLYPHASE INDUCTION (ASYNCHRONOUS) DYNAMOS
+// Example 9-2
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+
+s_a = 5*(1/100); // Slip (case a)
+s_b = 7*(1/100); // Slip (case b)
+
+// Given data and calculated values from Ex.9-1
+f_a = 60 ; // Line frequency in Hz (case a)
+f_b = 50 ; // Line frequency in Hz (case b)
+S_a = 1200 ; // Speed in rpm of the rotating magnetic field (case a)
+S_b = 1000 ; // Speed in rpm of the rotating magnetic field (case b)
+
+// Calculations
+
+// case a
+S_r_a = S_a * ( 1 - s_a ); // Rotor speed in rpm when slip is 5% (case a)
+
+// case b
+S_r_b = S_b * ( 1 - s_b ); // Rotor speed in rpm when slip is 7% (case b)
+
+// Display the results
+disp("Example 9-2 Solution : ");
+
+printf(" \n a: S_r = %.f rpm  @ s = %.2f  \n ", S_r_a ,s_a );
+
+printf(" \n b: S_r = %.f rpm  @ s = %.2f  ", S_r_b ,s_b );