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+// Exa 2.2
+clc;
+clear;
+close;
+format('v',6)
+// Given data
+Rf = 10;// in ohm
+R_L = 1;// in k ohm
+R_L = R_L * 10^3;// in ohm
+Vi = 230;// in V
+Vm = Vi*sqrt(2);
+//I_DC = Im/%pi;
+I_DC = Vm/((R_L+Rf)*%pi);// in A
+Irms = Vm/((R_L+Rf)*2);// in A
+// The input ac power 
+P_iAC = (Irms^2)*(Rf+R_L);// in W 
+disp(P_iAC,"The input ac power in W is");
+// The output ac power 
+P_ODC = (I_DC^2)*R_L;// in W
+disp(P_ODC,"The output ac power in W is");
+// The efficiency 
+Eta = (P_ODC/P_iAC)*100;// in %
+disp(Eta,"The efficiency in % is");
+// The percentage regulation 
+R = (Rf/R_L)*100;// in %
+disp(R,"The percentage regulation in % is");
+
+// Note: The calculated value of input a.c. power in the book is wrong.