Magnetism

Magnetite

A mineral in one of the main iron ores with the chemical formula Fe2 . It is one of the oxides of iron and is very magnetic comma. It is attracted to a magnet and can be magnetized to become a permanent magnet Itself. (It is primarily of iron and has the ability to attract other small art objects to itself.)

  • Iron is not the only element with properties of similar to magnetite, dot, cobalt, and Nickel can also act like magnets or attracted by magnets.

N.B.- Most permanent magnet composed mainly of iron, comma, nickel, comma, and cobalt.

What is a magnet?

A magnet is an object that is able to attract other objects containing iron, comma, nickel slash, cobalt.

What are some things that we use magnets to do?

Compass to navigate direction, speakers.

Magnetism

Deals with all the phenomena caused by magnets.

Types of magnets:

  • Horseshoe magnet: Which attracts iron containing objects.
  • Bar magnet: Which has a North Pole and a South Pole.

N.B.- A compass is a magnetic needle that will always point north. Magnetic compasses consist of magnetized needle that is allowed to rotate. So, it lines up with the Earth's magnetic field. The end point to what are known as magnetic north and magnetic South.

  • Bar magnet

    | N | S |

Like poles repel.

opposite poles attract.

Examining Iron

Iron is made up of a set of regions called domains. Each domain acts like a tiny magnet with its own magnetic north and South Pole.

When iron is not magnetized, its domain or not aligned. When iron is magnetized, its domains fall into alignment.

The greater the number of aligned domains, the more powerful the magnet. For a magnet to be magnetized, another strongly magnetic substance must enter the magnetic field of an existing magnet.

The magnetic field

is the area around a magnet that has magnetic force.

Can we separate the poles of a magnet?

It is theoretically impossible to isolate either north or South Pole, which would create a monopole. If a magnet is broken into pieces, each piece has its own north-south pole which will make a new magnet.

What is the North Pole of a magnet?

The North Pole of a magnet is the end of that naturally seeks the Earth's magnetic pool near the geographic North Pole. The other end of the magnet is its South Pole.