Is zero resistance possible ?
EXPLAIN .
Is zero resistance possible ?
EXPLAIN .
Possible it is! The state of zero electrical resistance is called superconductivity, and it can be induced in many materials by cooling them to very low temperatures. Ceramic, for instance, becomes superconductive at about 200 degrees below zero Celsius. There are several other materials that, like ceramic, are superconductive at temperatures well above absolute zero (0°Kelvin). These are referred to as “high temperature superconductors.”
And therein lies the impracticality of the superconductors available right now - 200 degrees below zero is very very cold. It's certainly possible to cool things to these kinds of temperatures, and even practical in some manufacturing techniques (cryogenics). But it's not nearly as easy when your supercooled items are then required to carry large quantities of electrical current.
So right now, mainstream use of superconductors is limited. It may be used for research or even for some types of manufacturing but it's not likely that it will be used, say, for central power transmission any time in the near future.
There are several other materials that, like ceramic, are superconductive at temperatures well above absolute zero (0°Kelvin). These are referred to as “high temperature superconductors.”
And therein lies the impracticality of the superconductors available right now - 200 degrees below zero is very very cold. It's certainly possible to cool things to these kinds of temperatures, and even practical in some manufacturing techniques (cryogenics). But it's not nearly as easy when your supercooled items are then required to carry large quantities of electrical current.
So right now, mainstream use of superconductors is limited. It may be used for research or even for some types of manufacturing but it's not likely that it will be used, say, for central power transmission any time in the near future.
