GEOLOGY

Detailed explanation-1: -The nail will stick to the bar magnet because it will become magnetized. The presence of the nearby north pole rearranges the magnetic domains inside the steel so that their south poles all point toward the north pole of the permanent magnet. As a result, the other end of the nail becomes a north pole.

Detailed explanation-2: -A domain is a region inside of a material where groups of magnetic moments naturally align in the same direction. There can be numerous domains within an object. When there is no external magnetic field present, the domains are also oriented randomly so that there is no net magnetic field.

Detailed explanation-3: -If you bring a magnet is brought nearby, the domains of the iron nail will align in such a way that, the north pole of iron domains will face the south pole of the magnet, and visa versa. When you remove the magnet, the nail becomes permanent magnet for a while.

Detailed explanation-4: -The presence of the magnet aligns the domains in the iron paper clip and it becomes a temporary magnet. Whichever pole of the magnet is brought near the paper clip will induce magnetic properties in the paper clip that remain as long as the magnet is near.

Detailed explanation-5: -The microscopic ordering of electron spins characteristic of ferromagnetic materials leads to the formation of regions of magnetic alignment called domains.