Question

How do field lines of regions of strong field different from those of weak field

Answer 1

The density of the lines indicates the magnitude of the magnetic field.At the poles of a magnet, for example, where the magnetic field is strong, the field lines are crowded together, or more dense. Farther away, where the magnetic field is weak, they fan out, becoming less dense. ... The direction of the flux is the direction in which the north-seeking pole of a small magnet points The lines of flux are continuous, forming closed loops. For a bar magnet, they emerge from the north-seeking pole, fan out and around, enter the magnet at the south-seeking pole, and continue through the magnet to the north pole, where they again emerge. .