Question

what is magnetic field line a and their properties??​

Answer 1

Answer:

magnetic field lines are imaginary curve line which comes out from North Pole and enters into south Pole.the tangent at any point on curved line gives us direction of magnetic field.

Answer 2

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.