Question

difference between magnetic line and magnetic field?

also some properties.

Answer 1

The region around which magnetic effect can be detected is known as Magnetic field.
it's properties are
It emerges from North pole and mege at south pole outside the magnet and south pole to North pole inside the magnet
The line are closed curve
Inside the magnet field lines are parallel
Field lines do not cross each other as they are unidirectional.