GEOLOGY

Detailed explanation-1: -Magnetic lines being close together mean a strong magnetic field and lines far apart from each other mean a weak magnetic field. The magnetic field is the strongest at the poles of a magnet, so the lines are closer to each other at poles.

Detailed explanation-2: -The closer the magnetic field lines are, the stronger the magnetic field at that point. As we can see in the diagram, the magnetic field lines are closer or denser at the poles. So, the magnetic field is strongest around the poles of the magnet.

Detailed explanation-3: -The magnetic field of a bar magnet is strongest at either pole of the magnet. It is equally strong at the north pole when compared with the south pole. The force is weaker in the middle of the magnet and halfway between the pole and the center.

Detailed explanation-4: -The magnetic field is strongest at the poles as the field lines are very close to each other near the poles.

Detailed explanation-5: -The magnetic field is weakest at the center and strongest between the two poles just outside the bar magnet and the magnetic field lines are least dense at the center and densest between the two poles just outside the bar magnet.