Section 1
Magnetism and Magnetic Fields
Book
Version 3
By Boundless
By Boundless
Boundless Physics
Physics
by Boundless
4 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/14379/raw/regla-mano-derecha-laplace.jpg)
Electric Currents and Magnetic Fields
An electric current will produce a magnetic field, which can be visualized as a series of circular field lines around a wire segment.
![Thumbnail](../../../../../../figures.boundless-cdn.com/14290/square/figure-23-02-01a.jpeg)
Permanent Magnets
Permanent magnets are objects made from ferromagnetic material that produce a persistent magnetic field.
![Thumbnail](../../../../../../figures.boundless-cdn.com/14382/square/220px-magnet0873.jpg)
Magnetic Field Lines
Magnetic field lines are useful for visually representing the strength and direction of the magnetic field.
![Thumbnail](../../../../../../figures.boundless-cdn.com/15557/square/uter-core-convection-rolls.jpeg)
Geomagnetism
Earth's magnetic field is caused by electric currents in the molten outer core and varies with time.