A superconductor is placed on top of the magnet. As a result, the superconductor will be elevated. Why after some years the superconductor will not remain elevated and falling down to the magent?
2006-07-27 17:28:13 · 7 answers · asked by Jessy 1 in Science & Mathematics ➔ Physics
because the superconductor is imperfect
if there is absolutely no resistance ever, and no external disturbance, then the conductor will levitate forever
of course, how could you maintain a perfect super-conductor forever? the known super-conductors have to be kept very cold
the so called high-temperature super conductors need to be kept near the temperature of liquid nitrogen
2006-07-27 17:33:55 · answer #1 · answered by enginerd 6 · 0⤊ 0⤋
That's backwards. The classic experiment is of a magnet spinning above the superconductor. And it only happens for as long as it takes for the SC to warm up. Theoretically, it should spin forever, but then there's air resistence, so maybe not.
2006-07-28 00:35:46 · answer #2 · answered by Anonymous · 0⤊ 0⤋
most of the superconductor that are around today need to be supercooled to stay efficient and working, when the get better they will not require the supercooling, the temp. of liquid nitrogen, and will be able to work at room temp. or so.
2006-07-28 00:39:27 · answer #3 · answered by nobody722 3 · 0⤊ 0⤋
I imagine that the magnet is doing work on the super-conductor, slowing down the movement of it's electrons, and slowly disipating the current through it over time.
2006-07-28 00:35:08 · answer #4 · answered by Argon 3 · 0⤊ 0⤋
If the temperature gets too warm.
2006-07-28 00:32:35 · answer #5 · answered by kako 6 · 0⤊ 0⤋
The process of beans and rice.
2006-07-28 01:38:18 · answer #6 · answered by PoohP 4 · 0⤊ 0⤋
he missed his train
2006-07-28 00:31:11 · answer #7 · answered by Anonymous · 0⤊ 0⤋