Charges--Conceptual Question I uploaded a diagram, for I have questions pertaining to it. First, imagine there no q3 charge. I understand that if there existed no q3 charge, then the two negative charges would assuredly exert repulsive forces on each other. My question is, would this repulsive force cease to exist once the presence of q3 is established between the two positive charges; and would it discontinue to exist even if q3 was unbelievably small? I ask, because once q3 is conceived between the two negative charges, there is no straight line between either negative charge to the other for a component of their electric field to act along, even if q3 were incredible small. Essentially my question is, does the presence of q3 imply that the two negative charges don't exert repulsive forces on each other?