When two parallel current-conducting rods carry currents in the same direction, they attract each other due to the magnetic fields they generate. The interaction of these magnetic fields can be analyzed using Fleming's left-hand rule, which indicates that the force between them is directed towards each other. Conversely, if the currents flow in opposite directions, the magnetic forces repel each other. This phenomenon is rooted in the principles of electromagnetism, where the direction of current flow determines the nature of the force between the conductors. Understanding these interactions is essential for applications in electrical engineering and physics.