Do black holes have a magnetic charge?

Answer 1

A black hole can have an electric charge if it swallows electrically charged objects, but no objects that we know of have magnetic charge. Magnets always have both a north pole and a south pole; there is no evidence that one can exist alone. A lone north or south pole would be called a magnetic monopole, and would have magnetic charge. If we discovered a magnetic monopole and fed it to a black hole then the black hole would gain the magnetic charge.

Answer 2

One of the solutions to the Einstein field equations is called the Kerr-Newman metric, which describes a black hole which is both electrically charged and has angular momentum... and a charged object which has angular momentum generates a magnetic field.

Answer 3

Black holes can have magnetic fields but do not possess a magnetic charge in the same way that particles like protons or electrons do. The magnetic fields around black holes are generated by the movement of charged particles in the surrounding environment.