Question

what is magnetic field?

Answer 1

region around a magnetic material or a moving electric charge within which the force of magnetism acts.

Answer 2

A magnetic field is generated when electric charge carriers such as electrons move through space or within an electrical conductor. The geometric shapes of the magnetic flux lines produced by moving charge carriers (electric current) are similar to the shapes of the flux lines in an electrostatic field. But there are differences in the ways electrostatic and magnetic fields interact with the environment.