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From: arnief@tekgvs.LABS.TEK.COM (Arnie Frisch)
Newsgroups: sci.electronics,sci.physics
Subject: Re: HV Cap Fun!
Summary: Right, and they also don't conduct infinite currents....
Message-ID: <5274@tekgvs.LABS.TEK.COM>
Date: 5 Jun 89 15:43:12 GMT
References: <4924@m2c.M2C.ORG> <3806@mit-amt> <20772@quacky.mips.COM> <1989Jun3.211635.2752@utzoo.uucp>
Followup-To: sci.electronics,sci.physics,poster
Organization: Tektronix Inc., Beaverton, Or.
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In article <1989Jun3.211635.2752@utzoo.uucp>, henry@utzoo.uucp (Henry Spencer) writes:
> In article <747@eplunix.UUCP> raoul@eplunix.UUCP (Otero) writes:
> >What about superconducting materials? No resistive heat dissipation at all.
> 
> Nope, sorry, wrong:  superconductors have zero resistance only for DC.
> Running AC through a superconductor does produce heat.
> -- 
> You *can* understand sendmail, |     Henry Spencer at U of Toronto Zoology



Also, superconductors can not conduct infinite currents, the maximum
current is limited by  the magnetic field it produces - which
ultimately causes the conductor to go "normal".

This puzzle has been beaten to death.  There is no puzzle now, nor was
there one 30 years ago when I first heard it.  There are no perfect
conductors, or capacitors, or inductors.  The capacitors wind up at 5
volts, and the extra energy goes into heat and em radiation.  Let's
kill it!