What is a magnetic field

We still remember the magnetic field with the school, that's just what it represents, "pops up" in memories not everyone. Let's refresh what they passed, and perhaps we will tell something new, useful and interesting.

1

Determination of the magnetic field

The magnetic field is called a power field that affects moving electrical charges (particles). Thanks to this power field, objects are attracted to each other. Distinguish two types of magnetic fields:

1. Gravitational - forms solely near the elementary particles and is viring in its strength on the basis of the features and structure of these particles.
2. Dynamic, produced in objects with moving electric facilities (current transmitters, magnetized substances).

For the first time, the designation of the magnetic field was introduced by M. Faraday in 1845, it was true that it was slightly mistaken, as it was believed that the electric, and magnetic effects and interaction are carried out on the basis of the same material field. Later in 1873, D.Maxwell "presented" a quantum theory in which these concepts began to divide, and the previously derived power field was called an electromagnetic field.

2

How does the magnetic field appear?

Not perceived by the human eye magnetic fields of different items, but only special sensors can fix it. The source of the appearance of the magnetic power field in a microscopic scale is the movement of magnetized (charged) microparticles, which are:

• ions;
• electrons;
• protons.

Their movement occurs due to the spin magnetic moment, which is present in each microparticle.

3

Magnetic field, where can I find it?

No matter how strange it sounds, but almost all of us items have their own magnetic field. Although in the concept of many magnetic field there is only a pebble called a magnet that attracts iron objects to himself. In fact, the strength of attraction is in all subjects, only it is manifested in a lesser valence.

It should also be clarified that the power field, called magnetic, appears only on the condition that the electrical charges or bodies move.

Real charges have an electrical power field (it may be present in moving charges). It turns out that the sources of the magnetic field are:

• permanent magnets;
• moving charges.