Question

What are magnetic field lines list 3 charecterstics of this line

Answer 1

the lines around a magnet forming its magnetic field are known as magnetic field lines.
characterstics=
magnetic lines never intersect each other.
these are closed curves
magnetic lines emerge from north pole and merge at south pole.

hope it helps u

Answer 2

Here is your answer.

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

A magnetic field is a vector field that describes the magnetic influence of electrical current and magnetic material.

I hope this helps you.