# The Naked Scientists Forum

### Author Topic: Do moving charged particles emit a magnetic field?  (Read 1175 times)

#### ChaosD.Ace

• Jr. Member
• Posts: 15
##### Do moving charged particles emit a magnetic field?
« on: 16/10/2013 11:57:07 »
Example.

Electrolysis, you have sodium and clhoride ions moving, they have electric fields which are moving, does this mean they emit a magnetic field?

#### evan_au

• Neilep Level Member
• Posts: 4130
• Thanked: 249 times
##### Re: Do moving charged particles emit a magnetic field?
« Reply #1 on: 16/10/2013 21:32:47 »
If you have a current flowing (as in electrolysis), there will be a magnetic field generated.
The direction and orientation of the magnetic field can be determined from the "right-hand rule".
See: http://en.wikipedia.org/wiki/Right-hand_rule#Direction_associated_with_a_rotation

#### ChaosD.Ace

• Jr. Member
• Posts: 15
##### Re: Do moving charged particles emit a magnetic field?
« Reply #2 on: 18/10/2013 08:40:08 »
Thanks

#### flr

• Sr. Member
• Posts: 302
• Thanked: 2 times
##### Re: Do moving charged particles emit a magnetic field?
« Reply #3 on: 18/10/2013 18:10:19 »

Also, I believe it is very interesting the subject 'magnetism as a relativistic effect'.

See for start:
http://en.wikipedia.org/wiki/Relativistic_electromagnetism

#### Pmb

• Neilep Level Member
• Posts: 1838
• Physicist
##### Re: Do moving charged particles emit a magnetic field?
« Reply #4 on: 22/10/2013 07:22:13 »
Example.

Electrolysis, you have sodium and clhoride ions moving, they have electric fields which are moving, does this mean they emit a magnetic field?
Yes. An electric field in one frame can be transformed into a magnetic field as observed in another frame moving relative to the first. But it's not quite correct to say that it emits a magnetic field. To me the term "emit" means to radiate and detach. What do you mean by that term? I.e. does your head emit hair?

#### The Naked Scientists Forum

##### Re: Do moving charged particles emit a magnetic field?
« Reply #4 on: 22/10/2013 07:22:13 »