Three different two-charge systems are described below.
• System W: +2q and +2q separated by distance 2d
• System X: +3q and −q separated by distance 3d
• System Y: −2q and −3q separated by distance d
Rank the electric potential energies U_W, U_X, and U_Y from most positive to most negative.
a) UW>UY>UX
b) UY>UW>UX
c) UX>UW>UY
d) UW>UX>UY