Magnet Myths and Misconceptions

[MarkE]

Ok ,lets make this as simple as possable.
When we supply a DC current to a solenoid,is any of that input power used/consumed to create the magnetic field around that solenoid?

Yes.

[MarkE]

OK,i may have described this wrong by useing solenoid.
Lets make it an inductor insted to eliminate any moving parts that may impack on this thought experiment.

When a DC current is supplied to an inductor,is any of the input power consumed/used to create the magnetic field around that inductor,or is it all disipated as heat?.

2- Once the magnetic field around that inductor is astablished,dose it require any of the input power to that inductor to maintain that field,or is it all disipated as heat?

Every bit of energy that is in the magnetic field formed in and around the inductor is supplied by the power source that builds up the current / magnetic field. 2) Does not have a fixed answer.  Energy dissipated as heat is lost.  If there is no resistance, IE superconductor then there is no energy dissipated and lost.

[MarkE]

TK's correct F=V/R. The obvious advantage to the steel windings is that even though it will take over 5x's the power to create an equal flux density as the copper, the steel windings will act as a permanent magnet after the power's disconnected. This could turn into a huge energy savings over time, depending on the VRM of the coil.

You could follow the same logic and argue for magnetizing hard magnetic material.  The fallacy is that you are looking at the magnets in terms of force and comparing that to continuously applied power.

[scotty1]

"I made a lot more electricity with my generator than I ever made with urine soaked cloth."
--Ned Leedskalnin

That quote by Ed Leedskalnin gets more weird everytime I see it written. We must be up to the 10,000th monkey by now.
Here is what he actually said about the iron wire.

Quote: "Maybe you think that it is not fair to use iron wire to demon-strate how magnetic currents are made, but I can tell you that if I do not use iron core in the coil I can make more of the magnetic currents with soft iron wire coil than I can with copper wire coil, so you see it is perfectly good to use iron wire to demonstrate how magnetic currents are made."
Edward Leedskalnin....Magnetic Currents.

Where on Earth those words about urine come from is a mystery.....maybe the 10,000th monkey needed a piss....

[Cap-Z-ro]

Quote from: Cap-Z-ro on Today at 03:37:04 AM"I made a lot more electricity with my generator than I ever made with urine soaked cloth."
--Ned Leedskalnin


That quote by Ed Leedskalnin gets more weird everytime I see it written.

Where on Earth those words about urine come from is a mystery.....maybe the 10,000th monkey needed a piss....

That was actually a quote from Ed's weird brother Ned.

Regards...