What occurs when two conductors run side by side with their current flowing in the same direction?

When two conductors run parallel to each other with their currents flowing in the same direction, their magnetic fields interact in such a way that they combine to reinforce one another. This phenomenon is described by Ampère's circuital law, which states that the magnetic field created around a conductor follows the right-hand rule; when currents flow in the same direction, the magnetic fields created around each conductor increase in strength due to their alignment.

As a result, the magnetic field lines generated by each conductor add together, creating a stronger collective magnetic field in the region between the conductors. This can lead to attractive forces between the conductors if they are carrying current, as the combined magnetic field works to pull them closer together. Thus, the correct answer reflects the concept of aiding magnetic fields in this scenario.