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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 14: TRANSFORMERS
+// Example 14-5
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+P = 100 ; // Power rating of the single channel power amplifier in W
+Z_p = 3200 ; // Output impedance in ohm of the single channel power amplifier
+N_p = 1500 ; // Number of primary turns in a tapped impedance-matching transformer
+Z_L1 = 8 ; // Amplifier output in ohm using a tapped impedance-matching transformer
+Z_L2 = 4 ; // Amplifier output in ohm using a tapped impedance-matching transformer
+
+// Calculations
+// case a
+alpha = sqrt(Z_p/Z_L1) ; // Transformation ratio
+N_2 = N_p / alpha ; // Total number of secondary turns to match 8 ohm speaker
+
+// case b
+// subscript b for alpha indicates case b
+alpha_b = sqrt(Z_p/Z_L2) ; // Transformation ratio
+N_1 = N_p / alpha_b ; // Number of primary turns to match 4 ohm speaker
+
+// case c
+turns_difference = N_2 - N_1 ; // Difference in secondary and primary turns
+// subscript c for alpha indicates case c
+alpha_c = (1500/22); // Transformation ratio
+Z_L = Z_p / (alpha_c)^2 ; // Impedance that must be connected between 4 ohm and
+// 8 ohm terminals to reflect a primary impedance of 3.2 kilo-ohm
+
+// Display the results
+disp("Example 14-5 Solution : ");
+
+printf(" \n a: Transformation ratio : \n    α = %d \n ",alpha );
+printf(" \n    Total number of secondary turns to match 8 ohm speaker : ");
+printf(" \n    N_2 = %d t \n ",N_2 );
+
+printf(" \n b: Transformation ratio : \n    α = %.3f \n ",alpha_b );
+printf(" \n    Number of primary turns to match 4 ohm speaker : ");
+printf(" \n    N_1 = %d t \n ",N_1 );
+
+printf(" \n c: Difference in secondary and primary turns : ");
+printf(" \n    N_2 - N_1 = %.f t \n ",turns_difference );
+printf(" \n    Impedance that must be connected between 4 ohm and 8 ohm ");
+printf(" \n    terminals to reflect a primary impedance of 3.2 kilo-ohm : ");
+printf(" \n    Z_L = %.2f ohm ",Z_L );