The displacement of the rod suggests that a force is exerted on the current-carrying rod when placed in a magnetic field.

Ampère’s idea implies that there is a mutual interaction between magnets and current-carrying conductors, with the magnetic field exerting a force on the conductor and the conductor exerting an equal and opposite force on the magnet.

The force due to a magnetic field acting on a current-carrying conductor can be demonstrated through an experiment. Placing a magnet near the conductor and observing its movement or using a setup like Ampere’s law apparatus can showcase the interaction ...

French scientist André Marie Ampère (1775–1836) suggested that a magnet would exert an equal and opposite force on a current-carrying conductor.

The magnetic field produced by a current-carrying conductor exerts a force on a magnet placed in the vicinity of the conductor.