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+//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex4_3.sce
+
+clc;
+clear;
+r=[-0.03 0.01 0.04];
+r_dash=[0.03 0.08 -0.02];
+Q1=129e-9;
+Q2=110e-6;
+epsilon_not=1/(36*%pi*1e9);
+
+a=r-r_dash;  //r and r_dash are the position of two charges
+b=a.^2;
+c=b(1,1)+b(1,2)+b(1,3);
+d=sqrt(c);     //b,c,d are assumed alphabets for calculating magnitude of difference of r and r'  
+
+F=(Q1*Q2)/(4*%pi*epsilon_not*d^2);
+printf("\n The force on Q2=%2.1f N \n",F)
+Ir=a/d;
+F1=Ir*F;
+printf("\n Force interms of i,j,k vector coefficient is")
+disp(F1)
+
+//There is a error in the book for calculating F value
+//So answer given in the book is wrong