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+//determine the electric field at a point;
+//given
+clc
+Qf=2d-6
+Qt=1d-6
+rf=[1 0 0]//this can also be written as ax
+rt=[0 1 0]//this can also be written as ay
+rtf=rt-rf
+Rtf=norm(rtf)//this is the magnitude of the vector
+atf=rtf/Rtf//the unit vector across the two points p1 and p2
+//the electric field at the point p2 is given by:
+epsilon0=8.85D-12//value may differ, as i have not used the estimated value
+E=((Qf*Qt)/(4*%pi*epsilon0*(Rtf)^2))*atf//electric field calculation
+E=round(E*1d+6)/1d+6///rounding off decimals
+disp(E*1d+3,'the electric field of p2 is:')//mN/C