Undergrad Origin of the Earth's magnetic field

[timmdeeg]

How can the motion of liquid iron consisting of neutral iron atoms in the earth's core create magnetic fields? What am I missing?

 

[jedishrfu]

Veritaseum has a secondary video on how the Earth creates its magnetic field:

 

[timmdeeg]

Thanks, my English isn't good enough to understand that however.

 

[SDL]

Thanks, my English isn't good enough to understand that however.

Not a problem, A.I. rules. You can turn subtitles on and click pause anytime.

 

[timmdeeg]

I should have searched before asking.

Even before the Earth's magnetic field was first formed magnetic fields were present in the form of the sun's magnetic field. Once the process is going, the existing field acts as the seed field. As a stream of molten iron passes through the existing magnetic field, an electric current is generated through a process called magnetic induction. The newly created electric field will in turn create a magnetic field. Given the right relationship between the magnetic field and the fluid flow, the generated magnetic field can reinforces the initial magnetic field.

 

[jedishrfu]

You should cite quotes like you posted so readers can assess the accuracy of the source for themselves.

EDIT Ahh I see the quote is a link to where it came from. However you should still cite it as the url may one day fail and we wont know the source beyond the url.

 

[timmdeeg]

Just click on the quote.

 

[scottdave]

Just click on the quote.

As jedishrfu stated, sometimes websites change their link. So if someone finds this thread a few years from now, if the link doesn't work, then the user can start with the citation.

This particular link was published by the Canadian government, under the natural resources page.

 

[jedishrfu]

In the interests of future readers, here's the URL:

https://www.geomag.nrcan.gc.ca/mag_fld/fld-en.php