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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 14: TRANSFORMERS
+// Example 14-3
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+N_1 = 500 ; // Number of primary turns in the audio output transformer
+N_2 = 25 ; // Number of secondary turns in the audio output transformer
+Z_L = 8 ; // Speaker impedance in ohm
+V_1 = 10 ; // Output voltage of the audio output transformer in volt
+
+// Calculations
+// case a
+alpha = N_1/N_2 ; // step-down transformation ratio
+Z_1 = (alpha)^2 * Z_L ; // Impedance reflected to the transformer primary 
+// at the output of Tr in ohm
+
+// case b
+I_1 = V_1 / Z_1 ; // Primary current in A
+
+// Display the results
+disp("Example 14-3 Solution : ");
+
+printf(" \n a: Transformation ratio :\n    α = %d\n",alpha);
+printf(" \n    Impedance reflected to the transformer primary at the output of Tr :");
+printf(" \n    Z_1 = %d ohm \n ",Z_1);
+
+printf(" \n b: Matching transformer primary current :\n    I_1 = %f A",I_1);
+printf(" \n    I_1 = %.3f mA ",1000 * I_1);