• Study Resource
• Explore

Survey

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Transcript
```Magnets
Two poles of the same kind repel each other.
Two poles of the opposite kind attract each other.
1
Field lines
The lines show the
direction of force
on a north pole.
In the early 1800’s,
that iron filings line up
around a magnet to
show “force field lines”.
2
Electromagnets
In 1820 Hans Christien Ørsted
discovers that an electric current
in a wire creates a magnetic
field. This is the principle behind
the electromagnet.
3
Lorentz force
In 1892 Hendrick Lorentz discovers that a
current-carrying wire feels a force when it
is in a magnetic field. This is the principle
behind the electric motor.
The force on the electrons
is out of the page.
Why did it take him so long???
The force on the current is
perpendicular to the magnetic field
and perpendicular to the current.
(If the current is in the same direction
as the field, there is no force.)
4
```
Document related concepts

Electric machine wikipedia, lookup

History of geomagnetism wikipedia, lookup

Lorentz force wikipedia, lookup

Electromagnet wikipedia, lookup

Ferromagnetism wikipedia, lookup

Magnetoreception wikipedia, lookup

Casimir effect wikipedia, lookup

Skin effect wikipedia, lookup

Electromagnetism wikipedia, lookup

Mathematical descriptions of the electromagnetic field wikipedia, lookup

Superconducting magnet wikipedia, lookup

Magnetohydrodynamics wikipedia, lookup

Force between magnets wikipedia, lookup

Electricity wikipedia, lookup

Magnetism wikipedia, lookup

Magnetochemistry wikipedia, lookup

Electromotive force wikipedia, lookup

Multiferroics wikipedia, lookup

Magnet wikipedia, lookup

Aurora wikipedia, lookup

Giant magnetoresistance wikipedia, lookup

Magnetotellurics wikipedia, lookup

Earth's magnetic field wikipedia, lookup

Magnetotactic bacteria wikipedia, lookup

Electromagnetic field wikipedia, lookup

Magnetometer wikipedia, lookup

Similar