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+
+//To Calculate the Electric Field at a point
+
+//Example 29.1
+
+clear;
+
+clc;
+
+AC=5*10^-2;//The length of AC in metres
+
+PC=12*10^-2;//The length of PC in metres
+
+AP=sqrt(AC^2+PC^2);//Length of AP by Pythagoras Theorem
+
+Theta=acos(AC/AP);//Measure of angle PAC
+
+Q1=10*10^-6;//First Charge in Coloumbs
+
+Q2=-10*10^-6;//Second Charge in Coloumbs
+
+K=9*10^9;//Value of constant (1/(4*pi*ε0))
+
+EA=Q1*K/AP^2;//Electric Field at P due to First Charge
+
+EB=-Q2*K/AP^2;//Electric Field at P due to First Charge
+
+E=(EA+EB)*cos(Theta);//Magnitude of resultant Electric Field
+
+printf("elctric field at point P=%.1f*10^6 N/C",E/10^6);