Магнетизм. Электромагнетизм. Magnetism. Electromagnetism презентация

Magnetism. Electromagnetism

A magnetic field
This is a force field in space surrounding permanent magnets and currents.
The magnetic field is material.
It is created by magnets, currents, or moving charges.

Permanent Magnet Field
Lodestone - a piece of iron ore with the ability to attract nearby iron objects.
Land - giant natural magnet

Permanent Magnet Field
Using iron filings, you can get an idea of ​​the form of the magnetic field of permanent magnets.
Both magnetic lines of a magnetic current and magnetic lines of a magnetic field of a magnet are closed lines. Outside the magnet, the magnetic lines exit the north pole of the magnet and enter the south, closing inside the magnet just like the magnetic lines of a current coil.

Earth's magnetic poles
The Earth’s magnetic poles changed places many times (an inversion took place). Over 160 million years, this has happened about 100 times.
570 million years ago, the Earth’s magnetic poles were located near the equator.
Magnetic inversion

Earth's magnetic field
The Earth’s magnetic field reliably protects the Earth’s surface from cosmic radiation, which has a detrimental effect on living organisms. The composition of cosmic radiation, in addition to electrons and protons, includes other particles moving in space with huge speeds.

Magnetic induction lines
These are lines that clearly depict the magnetic field.
Always closed. A magnetic field represents vortex field.
Directed from the north poles (N) to the south the pole (S) permanent magnet.