AWOL's Comments
I'm not sure the explanation for this is quite correct-- superconductors don't "trap magnetic fields", they expel them, via something known as the Meissner effect.
If a superconductor is placed in a magnetic field, electric currents will be induced in the superconductor to exactly counter the magnetic field created by the magnet, making the magnetic field inside the superconductor exactly zero.
As for the previous comment, there are actually "machine ways to super refridgerate"-- known as closed cycle refrigerators. By the cyclical condensation and condensation of helium gas, these cryo-coolers can achieve temperatures below that of liquid nitrogen, 77 kelvin (though not that of liquid helium, 4 kelvin)
Since the induced magnetic field of the superconductor is at all times exactly countering the field of the magnet, an equal and opposite force is created, resulting in the levitation effect.
This is also why the train can go around corners--as the magnetic field from the track changes (i.e, the track curves) the field in the superconductor changes to exactly counter it, and the train goes around in a circle.
If a superconductor is placed in a magnetic field, electric currents will be induced in the superconductor to exactly counter the magnetic field created by the magnet, making the magnetic field inside the superconductor exactly zero.
As for the previous comment, there are actually "machine ways to super refridgerate"-- known as closed cycle refrigerators. By the cyclical condensation and condensation of helium gas, these cryo-coolers can achieve temperatures below that of liquid nitrogen, 77 kelvin (though not that of liquid helium, 4 kelvin)
Since the induced magnetic field of the superconductor is at all times exactly countering the field of the magnet, an equal and opposite force is created, resulting in the levitation effect.
This is also why the train can go around corners--as the magnetic field from the track changes (i.e, the track curves) the field in the superconductor changes to exactly counter it, and the train goes around in a circle.
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I'm not sure the explanation for this is quite correct-- superconductors don't "trap magnetic fields", they expel them, via something known as the Meissner effect.
If a superconductor is placed in a magnetic field, electric currents will be induced in the superconductor to exactly counter the magnetic field created by the magnet, making the magnetic field inside the superconductor exactly zero.
Since the induced magnetic field of the superconductor is at all times exactly countering the field of the magnet, an equal and opposite force is created, resulting in the levitation effect.
This is also why the train can go around corners--as the magnetic field from the track changes (i.e, the track curves) the field in the superconductor changes to exactly counter it, and the train goes around in a circle.
If a superconductor is placed in a magnetic field, electric currents will be induced in the superconductor to exactly counter the magnetic field created by the magnet, making the magnetic field inside the superconductor exactly zero.
Since the induced magnetic field of the superconductor is at all times exactly countering the field of the magnet, an equal and opposite force is created, resulting in the levitation effect.
This is also why the train can go around corners--as the magnetic field from the track changes (i.e, the track curves) the field in the superconductor changes to exactly counter it, and the train goes around in a circle.
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But again, there are only two men, two woman and what i can only guess is an androgenous vampire in the middle there...