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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 1: INDUSTRIAL APPLICATIONS OF ELECTRIC MOTORS
+
+// EXAMPLE : 1.9 :
+// Page number 686-687
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+I_f1 = 25.0    // Current without diverter(A)
+N_1 = 500.0    // Speed of dc series motor without diverter(rpm)
+
+// Calculations
+I_a2 = ((3.0/2)**0.5*I_f1**2*3/2)**0.5   // Field current with diverter(A)
+N_2 = I_f1*N_1*3/(2*I_a2)                // Speed with diverter(rpm)
+
+// Results
+disp("PART IV - EXAMPLE : 1.9 : SOLUTION :-")
+printf("\nSpeed when field winding is shunted by a diverter, N_2 = %.f rpm", N_2)
+printf("\nCurrent when field winding is shunted by a diverter, I_a2 = %.1f A", I_a2)