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+//Caption:Finding the value of capacitor
+//Ex no.1.3
+clc;
+clear;
+close;
+I=10;//Current drawn by the load (in Amperes)
+pf1=0.5;//lagging power factor
+pf2=0.8;
+Q1=acosd(pf1);
+Q2=acosd(pf2);
+I_L=10*(cosd(-Q1)+%i *sind(-Q1));//in Amperes
+V=120;//source voltage (in Volts)
+f=60;//frequency of source (in Hertz)
+//Refer to fig 1.6(b)
+//I_Lc=I_L+I_c
+S=V*conj (I_L);//complex power absorbed by load (in Watts)
+//On connecting capacitor across load current (I) have 0.8pf lagging
+I_Lco=real (S)/(V*pf2);// current supplied by load after connecting capacitor (in Amperes)
+I_Lc=I_Lco*(cosd(-Q2)+%i*(sind(-Q2)));// in Amperes
+I_c=I_Lc-I_L;//in Amperes
+Z_c=V/I_c;//capacitive impedance (in Ohms)
+//Z_c=-jX_c
+X_c=Z_c/(-%i);//Capacitive reactance
+C=1/(2*%pi*f*X_c);
+disp(real (C),'Value of capacitance (in Farad) is=')
+\ No newline at end of file