2006-08-15 09:10:50 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Zero resistance conductors do exist. As far as I know they are called super-conductors. The reason they aren't for example in our computers today is that no current material becomes a superconductor until several hundred degrees Celsius below zero. so they are still not practical to use.
2006-08-15 09:17:26 · answer #1 · answered by Solarsail 2 · 1⤊ 0⤋
The superconductors which can be cooled with liquid nitrogen are too brittle to make good wires out of. People are working on a more flexible superconductor. So for now they are only used in experiments.
Also superconductors have limits to how much current they can carry before they become regular conductors - a very bad thing at high currents. People are also working on increasing those current limits.
2006-08-15 18:22:41 · answer #2 · answered by rscanner 6 · 0⤊ 0⤋
You know, as a whole I'm pretty disappointed with the application of science in the new millennium. It seems like we are being told about huge breakthroughs and crap all the time and they never amount to anything. I remember not too long ago there was a lot of hopeful speculation about a new invention Dean Kamen was about to reveal. Some dared to dream of free energy or something like that but it was touted as a device which would "change the ways cities are built". When it was finally revealed it turns out the dude invented a little scooter - the Segway. Oh. Neat. They also told us a cure for cancer was around the corner, ditto AIDS. Now they say if we only had stem cell research we could cure all this crap. Forgive me if I don't believe you but didn't you guys just say not to long ago that as soon as you decoded the human genome you could cure all that crap? Well, the genome has been decoded and my mother-in-law is still slowly dying of cancer. Thanks a lot, guys. Take your zero-resistance conductors and your human genome and your stem cells and freakin' shove em up your.... sigh. I need to get a life.
2006-08-15 16:21:14 · answer #3 · answered by Cybeq 5 · 0⤊ 1⤋
Actually they're improving. At first they had to be cooled to near absolute zero with liquid hydrogen or helium. More recently they've been able to develop ceramic conductors that only need liquid nitrogen. The goal of course is to have a conductor that's effective at room temperature but that's probably several years in the future.
2006-08-15 16:19:20 · answer #4 · answered by BobbyD 4 · 1⤊ 0⤋
Zero resistance conductors do exist. They are referred to as superconductors. The main problem is that very low temperatures are required for any known material to gain superconductivity. Scientists are currently working with ceramics and other materials to find superconductors that can be used outside the lab.
2006-08-15 16:30:17 · answer #5 · answered by msi_cord 7 · 0⤊ 0⤋
Theoretical Physics and Physics in the real world aren't the same thing... Superconductors were not the great panacea they were promised to be.
2006-08-15 16:16:57 · answer #6 · answered by Anonymous · 1⤊ 0⤋
They are called super conductors. It is used in experimements
2006-08-15 16:15:49 · answer #7 · answered by Dr M 5 · 0⤊ 0⤋
They exist, they're called superconductors. The problem is we havn't figured out good applications for them yet.
2006-08-15 16:16:05 · answer #8 · answered by Phoenix 3 · 0⤊ 0⤋
They're still working on it.
http://en.wikipedia.org/wiki/High-temperature_superconductors
2006-08-15 16:17:13 · answer #9 · answered by Anonymous · 1⤊ 0⤋
Isn't that impossible? That would lead to the perpetual motion notion, which isn't possible.
2006-08-15 16:15:14 · answer #10 · answered by uranium9v 2 · 0⤊ 0⤋