23-03-2012, 11:16 AM
Superconductivity and Classroom Applications
bowles.ppt (Size: 1.92 MB / Downloads: 68)
Why Is All This Important?
Superconductivity” generates over 200,000 hits on any given web search
Attracts thousands of scientists from all over the world to conferences.
Addresses major societal issues such as energy
Government and Private Investments are in Billions of Dollars
What Defines a Superconductor?
There are TWO distinct properties.
They have ZERO resistance
They exhibit DIAMAGNETISM
Diamagnetism: repelled by a magnet
How This All Began?
Three different hypotheses existed on how resistance would respond as temperature approaches 0 K:
Resistance would increase (Kelvin)
Resistance would plateau (Matthiessen)
Resistance would continue to drop gradually to 0 and 0 K (Dewar).