Why does electromagnetic induction happen?

[Goat]

Hi All

Here's a question asked by a 17 year old at:

http://www.phy6.org/earthmag/magnQ&A2.htm#q19

From a presentation of the Faraday Dynamo at:

http://www.phy6.org/earthmag/dynamos.htm

Here's a quote from the answer to the 17 year old I found rather interesting: 

    "In this formulation, what a changing magnetic field or flux creates is not a current but an electric field. If an electric conductor occupies the location, the electric field causes a current to flow, because an electric field in a conductor drives a current. But the basic relation is not between magnetic fields and electric currents, it is between magnetic and electric FIELDS.

    Still with me? It turns out that the components of magnetic and electric fields belong to a single symmetric pattern, and Faraday's law of induction is necessary to maintain that pattern. In relativity, they express different components of the same 4-dimensional tensor (that's one level up from a vector), and transforming fields from one moving frame to another, magnetic fields in one frame contribute part of the electric field in the other, and vice versa.

    Why that pattern and not another one? I don't know, maybe because it has a pretty symmetry. Ask the guy upstairs."


Quite a fascinating view of the inner workings of a dynamo and it's relationship with how electricity is formed by moving magnetic fields against a wire! 

I also found this quote interesting:

"One could, for instance, link two Faraday dynamos, each supplying the current needed to produce the other's magnetic field.  They could (in principle) form a feasible self-excited dynamo, deriving its energy from whatever force was turning the disks."

  I think that the 4-dimensional tensor has applications in many OU projects whether moving magnets or coils or Faraday's Dynamo or electronics or a mix of both and/or all...Bedini comes to mind...LOL

This quote put a spin on it

"a changing magnetic field or flux creates is not a current but an electric field. If an electric conductor occupies the location, the electric field causes a current to flow, because an electric field in a conductor drives a current"

Just something to think about, I think it could link to many OU projects I could be wrong but what the heck, maybe someone out there can link all this info into a working model 

Kind Regards,
Paul

[forest]

Hi All

Here's a question asked by a 17 year old at:

http://www.phy6.org/earthmag/magnQ&A2.htm#q19

From a presentation of the Faraday Dynamo at:

http://www.phy6.org/earthmag/dynamos.htm

Here's a quote from the answer to the 17 year old I found rather interesting: 

    "In this formulation, what a changing magnetic field or flux creates is not a current but an electric field. If an electric conductor occupies the location, the electric field causes a current to flow, because an electric field in a conductor drives a current. But the basic relation is not between magnetic fields and electric currents, it is between magnetic and electric FIELDS.

    Still with me? It turns out that the components of magnetic and electric fields belong to a single symmetric pattern, and Faraday's law of induction is necessary to maintain that pattern. In relativity, they express different components of the same 4-dimensional tensor (that's one level up from a vector), and transforming fields from one moving frame to another, magnetic fields in one frame contribute part of the electric field in the other, and vice versa.

    Why that pattern and not another one? I don't know, maybe because it has a pretty symmetry. Ask the guy upstairs."


Quite a fascinating view of the inner workings of a dynamo and it's relationship with how electricity is formed by moving magnetic fields against a wire! 

I also found this quote interesting:

"One could, for instance, link two Faraday dynamos, each supplying the current needed to produce the other's magnetic field.  They could (in principle) form a feasible self-excited dynamo, deriving its energy from whatever force was turning the disks."

  I think that the 4-dimensional tensor has applications in many OU projects whether moving magnets or coils or Faraday's Dynamo or electronics or a mix of both and/or all...Bedini comes to mind...LOL

This quote put a spin on it

"a changing magnetic field or flux creates is not a current but an electric field. If an electric conductor occupies the location, the electric field causes a current to flow, because an electric field in a conductor drives a current"

Just something to think about, I think it could link to many OU projects I could be wrong but what the heck, maybe someone out there can link all this info into a working model 

Kind Regards,
Paul

Tesla patented two Faraday dynamos working together.

[Goat]

Interesting @ forest,,,which patent?

[Goat]

Is it this one? 

See photo below...and http://www.google.com/patents/about?id=VMtxAAAAEBAJ&dq=390721+1888+nikola+tesla

[Goat]

Hi All

Is there anyone on this forum that can see the quotes above and come up with a circuit to create the twin dynamo using Solid State circuits or 12 VDC motor with a commutator timed for the above scenario where one Dynamo generates and delivers the current needed to produce the others magnetic field and get it to the self-excited dynamo stage?

Long winded question...sorry 

Regards,
Paul