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+
+//Example 15_6
+clc();
+clear;
+//To find the magnitude of E
+k=9*10^9    //Units in N meter^2/C^2
+q=3.6*10^-6      //Units in C
+theta=37          //Units in degrees
+r=10*sin(theta*%pi/180)*10^-2    //Units in meters  
+e1=(k*q)/r^2     //Units in N/C
+q2=5*10^-6      //Units in C
+theta=37          //Units in degrees
+r1=10*10^-2 //Units in meters  
+e2=(k*q2)/r1^2     //Units in N/C
+e1y=e1         //Units in N/C
+e2x=e2*cos(theta*%pi/180)    //Units in N/C
+e2y=-e2*sin(theta*%pi/180) //Units in N/C
+ex=e2x       //Units in N/C
+ey=e1y+e2y        //Units in N/C
+e=sqrt(ex^2+ey^2)         //Units in N/C
+printf("The magnitude of E is=")
+disp(e)
+printf("N/C")
+//In text book the answer is printed wrong as E=7.26*10^6 N/C but the correct answer is E=7198876.9 N/C