The particle, initially at rest, is acted upon only by the electric force and moves from point a to point b along the x axis, increasing its kinetic energy by 1.44×10−18 . in what direction and through what potential difference does the particle move? the particle moves to the left through a potential difference of vb−va= 1.80 v . the particle moves to the left through a potential difference of vb−va= -1.80 v the particle moves to the right through a potential difference of vb−va= 1.80 v . the particle moves to the right through a potential difference of vb−va= -1.80 v . the particle moves to the left through a potential difference of vb−va= 18.0 v . the particle moves to the right through a potential difference of vb−va= -18.0 v .