what is magnetic field and define magnetic line
Answers
a region around a magnetic material or a moving electric charge within which the force of magnetism acts.
The magnetic field is described mathematically as a vector field. This vector field can be plotted directly as a set of many vectors drawn on a grid. Each vector points in the direction that a compass would point and has length dependent on the strength of the magnetic force.
The magnetic field can be defined as:
“A region around/surrounded by a moving electric charge or a magnetic material within which the force of magnetism acts.”
How does Magnetic Field occur?
If you are wondering how Magnetic fields occur. Well, it occurs whenever a charge is in motion. That being said if you apply more charge in the motion the strength of a magnetic field usually increases. Besides, Magnetism and magnetic fields are part of the electromagnetic force which is indeed one of the four prime forces of nature.