An electric charge is a fundamental physical property of matter that causes it to experience a force when placed in an electric field. It can be either positive or negative, and is measured in units of coulombs (C).
A magnetic monopole is a hypothetical particle that has only one magnetic pole (either north or south), in contrast to traditional magnets which have both a north and south pole. It is predicted by some theories, but has not been observed in nature.
Electric charges interact with magnetic monopoles through a force called the Lorentz force, which causes the charged particle to experience a force perpendicular to both its velocity and the magnetic field created by the monopole.
While magnetic monopoles have not been observed in nature, their existence is predicted by some theories, such as the Grand Unified Theory (GUT) and string theory. However, their existence has not been confirmed by experiments.
If magnetic monopoles were to be discovered and harnessed, they could potentially have a wide range of applications in fields such as energy storage, communications, and transportation. However, further research and development is needed before these applications become a reality.