The electric field, E, due to a point charge, q,at a field point located by the relative position vector r is given by

E = kelec*(q/r^2)*r/r or using components in Andes

E = kelec* abs(q)/r^2 (magnitude)

E_x = kelec*(q/r^2) * cos(qr)

E_y = kelec*(q/r^2) * sin(qr)

where

r = sqrt(r_x^2 + r_y^2)

where r is the vector from the point charge, q, to the field point. (Use the "Relative Position " tool ,"R", on the interface to define r.)

cos(qr) = r_x/r

sin(qr) = r_y/r

NOTES:

1) kelec is a given constant in Andes. It doesn't need to have a value assigned to it.

2) The direction of E is radial away from a positive charge and toward a negative charge.