Magnetism and electromagnetism

Abstract

Magnet is a piece of iron (or steel, alloy. ..) that has the ability to attract another metal object. Permanent magnet is a magnet that retains its magnetism over a long period of time after it is removed from a magnetic field. Magnetism is the attraction or repulsion properties of a magnet. A magnet has two areas of strongest force, called poles. Every magnet has a North and South Pole (N and S). The basic law of magnet: Like poles repel, unlike poles attract. Magnetic field is a place near a magnet or a moving electric charge where magnetic properties are produced (an invisible area of magnetism produced by moving the electric charge). Electromagnetic force is a force between charged objects around their electric and magnetic fields. Magnetic field lines (the lines of force) around a magnet describe the directions of the magnetic field (they can be plotted with iron filings and paper). Outside: the magnetic field lines travel from the North Pole (N) to the South Pole (S). Inside: from the South Pole to the North Pole.