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+clc
+// Fundamental of Electric Circuit 
+// Charles K. Alexander and  Matthew N.O Sadiku  
+// Mc Graw Hill of New York 
+// 5th Edition 
+
+// Part 2     :  AC Circuits 
+// Chapter 11 :  AC power Analysis 
+// Example 11 - 15
+
+clear; clc; close; 
+//
+// Given data
+pf_old     = 0.8000;
+pf_new     = 0.9500;
+f          = 60.0000;
+Vrms_mag   = 120.0000;
+Vrms_angle = 0.0000;
+P_load     = 4.0000;
+Vrms = complex(Vrms_mag*cosd(Vrms_angle),Vrms_mag*sind(Vrms_angle))
+// Calculations S1 dan Q1
+S1 = (P_load*1000)/pf_old;
+Q1 = S1 * sind(acosd(pf_old));
+// Calculations S2 dan Q2
+S2 = (P_load*1000)/pf_new;
+Q2 = S2 * sind(acosd(pf_new));
+// Calculations Reactive Power of Capacitors and Capacitance of Capacitors 
+Qc = Q1 - Q2;
+C = Qc/(2*%pi*f*(Vrms_mag)^2);
+//
+disp("Example 11-15 Solution : ");
+printf(" \n a. Qc    = Reactive Power of Capacitors     = %.3f VAR",Qc)
+printf(" \n a. C     = Capacitance of Capacitors        = %.7f MikroFarad",C*1000000)