Mercury Magnetics

Mercury Magnetics

Magnetism and electricity

Today, physicists believe that all phenomena are the result of magnetic forces between the moving electric charges, and in day to day large amounts of electricity are generated by the relative motion between the electrical conductors and magnetic fields.

Furthermore, electrical energy is transformed into mechanical energy also for systems that use the relative motion between electric currents and magnetic fields. The function of many electrical measuring instruments depend on the relationship between electricity and magnetism.

Before undertaking the study of magnetic effects of electric currents, we examine the magnetic properties of substances and we to learn something about the nature of magnetism and magnetic fields.

Magnetic substances

Ore deposits magnetic iron were discovered by the Greeks, in an area of Turkey, many centuries. The area was then known as magnesia and, thus, the mineral was named magnetite. Magnetite Other deposits are found in other world regions, and parts of magnetite are known as natural magnets.

One of those pieces, suspended in a thread, he / she joins the Earth's magnetic field. About the twelfth century, men began to use natural magnets which he called lodestone, as the first magnetic compasses.

Some materials, especially iron and steel, which are strongly attracted to magnets, cobalt and nickel are attracted to a lesser degree. It is said that these substances have ferromagnetic properties.

Special Links, such as permalloy and alnico, have extraordinary ferromagnetic properties. Physicists have shown great interest for the structure of materials having the property of ferromagnetism.

Today very strong and versatile artificial magnets are made from ferromagnetic materials. Current alnico magnets (Al, Ni and Co) supporting a weight of more than 1 000 times that of their own magnets. The ferromagnetic substances are called "magnetic substances" commonly.

N of magnetic substances

The materials are commonly classified as non-magnetic or magnetic. He says those who do not show strong ferromagnetism of the iron family metals are non-magnetic. However, if the materials are put into the field a very strong magnet, it appears that some are slightly repelled by the magnet, while others are attracted to lightly.

Zinc, bismuth, sodium chloride, the gold and mercury healthy some of the substances slightly repelled and are said to be diamagnetic. The property the diamagnetism is an important concept in the modern theory of magnetism, as we shall see later.

Wood, aluminum, platinum, copper and oxygen (II) sulfate are examples of substances slightly attracted by a strong magnet. It is said that these materials are paramagnetic and that kind of behavior is called magnetic paramagnetism.

The domain theory of magnetism
This subject was approached, with prominence in this room 13. To read click here: magnetic domains.

The strength of the magnetic poles of

The fact that iron filings if the arrest, mainly in the ends of a bar magnet indicates that the magnetic force acting on the presentations primarily in those areas or poles, which means that the intermediate zone of the magnet is demagnetized The pole that appears in the north when the magnet is free to rotate about a vertical axis, is commonly called the north pole, pole or simply N. the opposite pole, that appears in the South, called the south pole or the pole S.

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