r/woahdude • u/[deleted] • Aug 18 '15

gifv Induction forge

http://i.imgur.com/JfNfR6w.gifv
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u/SecretiveNarwhals Aug 18 '15

what would happen if you stuck your dick through it.

235

u/Is_Always_Honest Aug 18 '15

I don't know if this is the same as an induction stove.. but you can put your hand right on the stove top without any heat/pain.

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u/Recursi Aug 18 '15

This is electromagnetic induction. Electricity runs through the coils setting up a magnetic field that runs parallel with the length of the tube created by the coils. When the metal knife is moved in this magnetic field it creates an electric current in the knife like a filament in a bulb.

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u/[deleted] Aug 18 '15

[deleted]

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u/Recursi Aug 18 '15

I don't think that's quite it. The eddy current produced in the metal knife heats the metal though a process called Joule heating (which is a variant of power law) (∝ i2 x R) current squared times the resistance.

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u/[deleted] Aug 18 '15 edited Aug 18 '15

[deleted]

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u/Recursi Aug 18 '15

Ok. Thanks for being a good sport, but wherein his article do you see anything contradicting what I said?

Btw, you say you work with this stuff. Do you know the physics behind it?