A magnetic field is a field of force produced by moving electric charges, by electric fields that differ in time, and by the peculiar magnetic field of elementary particles associated with the spin of the particle. This field is generally focused by 2 poles.
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it is a field produced by moving electric charges or current that change with time
magnetic field is a region where magnetic force is experienced
A region around a magnetic material or a moving electric charge within which the force of magnetism acts is known as magnetic field.