Question

How can you turn an alpin into a magnet ?

Answer 1

A magnet is an item or substance that generates a magnetic field. This magnetic field is invisible, but it is responsible for a magnet's most remarkable property: a force that attracts or repels other ferromagnetic elements such as iron, steel, nickel, cobalt, and others.

Complete answer:
A permanent magnet is an item constructed of magnetised material that generates its own permanent magnetic field. The term ferromagnetic refers to materials that can be magnetised and are also strongly attracted to a magnet (or ferrimagnetic). The elements iron, nickel, and cobalt, as well as several rare-earth metal alloys and naturally occurring minerals like lodestone, fall into this category.

Although ferromagnetic (and ferrimagnetic) materials are the only ones that are attracted to a magnet strongly enough to be called magnetic, all other substances respond to a magnetic field weakly, using one of many other forms of magnetism. To make a magnet, start by placing an iron strip on the table. Place one of the poles of a bar magnet near one of the iron strip's edges.

Move it along the length of the iron strip without lifting it until you reach the other end. Now elevate the magnet and bring the pole to the same position on the strip, making sure the two points are aligned. The fillings are drawn to the strip. This means the iron strip has turned magnetic. Remember that the pole of the magnet and direction of its travel should not vary.

Note: An electromagnet is a wire coil that behaves as a magnet while an electric current travels through it, but stops acting as a magnet when the current is turned off. Often, the coil is wrapped around a core of "soft" ferromagnetic material such as mild steel, which considerably amplifies the magnetic field created by the coil.