Metal coil - Magnetic flux

  • #1

Main Question or Discussion Point

I was reading there that if you wind a piece of metal wire into a coil it creates a magnetic field. Does this wire have to have current running through it? I know that a changing electric current creates a magnetic field but how does winding a piece of metal wire into a coil create magnetic flux?
 

Answers and Replies

  • #2
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I was reading there that if you wind a piece of metal wire into a coil it creates a magnetic field. Does this wire have to have current running through it? I know that a changing electric current creates a magnetic field but how does winding a piece of metal wire into a coil create magnetic flux?
it doesn't create flux perse. if you have a closed loop of wire you have a surface through which the earth's magnetic field creates a flux. flux is the penetration of a field through a closed surface so maybe that's what the book means.

and it's not a changing electric current that creates a magnetic field, just a regular current creates a magnetic field. a changing magnetic field creates a current.
 

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