Final answer:
The net force on the third charge placed equidistant from the dipole charges will be zero.
Step-by-step explanation:
The net force on the third charge placed equidistant from the dipole charges will be zero.
Since the dipole charges have equal magnitudes and opposite signs, they create an electric field that cancels out in the dipole's direction. This means that the net force on the third charge, placed equidistant from the dipole charges, will be zero due to the balanced electric field.
The direction of the net force on the third charge will depend on the orientation of the dipole charges, but it will always result in a net force of zero.