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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 : 1.21 :
+// Page number 705
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+t = 1.0          // Time(hour)
+hp = 15.0        // Motor rating(hp)
+T = 2.0          // Time constant(hour)
+theta_f = 40.0   // Temperature rise(°C)
+
+// Calculations
+P = (1.0/(1-exp(-t/T)))**0.5*hp     // One-hour rating of motor(hp)
+
+// Results
+disp("PART IV - EXAMPLE : 1.21 : SOLUTION :-")
+printf("\nOne-hour rating of motor, P = %.f hp\n", P)
+printf("\nNOTE: Changes in the obtained answer from that of textbook is due to more approximation in the textbook solution")