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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 14: TRANSFORMERS
+// Example 14-8
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+// power transformer
+V = 20 ; // No-load voltage in volt
+R_s = 18 ; // Internal resistance of the power amplifier in ohm
+R_L = 8 ; // Load resistance in ohm(Speaker)
+
+// Calculations
+// case a
+V_L = ( R_L / (R_L + R_s) )* V; // Load voltage in volt
+P_L = (V_L)^2 / R_L ; // Power delivered in W to the speaker when connected 
+// directly to the amplifier
+
+// case b
+alpha = sqrt(R_s/R_L); // Turns ratio of the transformer to maximize speaker power
+
+// case c
+V_2 = V / (2*alpha); // Secondary voltage in volt
+P_L2 = (V_2)^2 / R_L ; // Maximum power delivered in W to the speaker using matching
+// transformer of part b
+
+// Display the results
+disp("Example 14-8 Solution : ");
+
+printf(" \n a; Load voltage :\n    V_L = %.2f V across the 8 Ω speaker\n ",V_L);
+printf(" \n    Power delivered in W to the speaker when connected directly to the amplifier : ");
+printf(" \n    P_L = %.2f W \n ", P_L );
+
+printf(" \n b: Turns ratio of the transformer to maximize speaker power : ");
+printf(" \n    α = %.1f \n ", alpha );
+
+printf(" \n c: Secondary voltage :\n    V_2 = %f V \n ",V_2 );
+printf(" \n    Maximum power delivered in W to the speaker using matching ");
+printf(" \n    transformer of part b :\n    P_L = %f W ",P_L2 );