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Fumesucker

(45,851 posts)
13. Research continues apace on warm superconductors..
Sun Mar 18, 2012, 07:47 PM
Mar 2012

And a superconducting cable of whatever length is for most practical purposes a dead short, the "zero" resistance of superconductivity is awfully close to actual zero. It won't take much voltage at all to push extremely high amperages through a superconducting cable because of the vanishingly small resistance of the cable so the wattages might not be as high as you might be led to think by the high current.

If it only takes a microvolt to push the 200 million amps then the total wattage will be only 200 watts.

If you have a transformer with a one million turn primary and a single turn secondary when you put 200 amps into the primary the secondary will see 200 million amps at least in theory.

That's pretty much how a soldering gun works, multi turn primary single turn secondary that gets hot fast at the thin part.




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