magnetic charge

A magnetic monopole is a hypothetical particle possessing a magnetic charge, analogous to electric charge. Unlike a dipole, which has both a north and south pole, a monopole would have only a single pole. Currently, there is no experimental evidence for their existence.1

The concept is theoretically significant because the existence of even one magnetic monopole could explain why electric charge is always found in discrete multiples of the electron's charge. This phenomenon, known as electric charge quantization, remains a mystery in physics. Physicists continue to search for magnetic monopoles, particularly when particle accelerators reach new energy levels or new matter sources are discovered.1

Maxwell's equations, which describe electric and magnetic fields, state that there are no isolated magnetic poles. This is consistent with observations that magnetic field lines always form closed loops, unlike electric field lines which can begin and end on electric charges.23