That question can only be answered by examining whether or not the particles move in an electric field.
Let any line drawn in an electric field be divided up into small elements of length.
We may describe, through all the points in an electric field which have the same potential, surfaces called equipotential surfaces, and these will be everywhere perpendicular or orthogonal to the lines of electric force.
Let us suppose any other surface described in the electric field so as to cut the closel y compacted tubes.
Perhaps we may illustrate his position by saying that the elements undergo a change analogous to what takes place in iron, when by being brought into an electric field it becomes magnetic. The substance of the elements remain as well as their accidents, but like baptismal water they gain by consecration a hidden virtue benefiting soul and body.