This is when the
electrical resistance of metal disappears when
cooled. When cooled this means to a
temperature that one can never feel while
outside. This temperature is know as absolute
zero. This phenomenon is almost like that of
ferromagnetism which was explained on the
previous page. The eyes only see a magnet
floating around a track, but there is more to
superconductivity than just that. It can be
explained by the Meissner effect which is when
it repels its magnetic fields while its
transitioning to a superconductive state. The
magnet is said to have superdiamagnetism which
is when the total magnetic fields that is felt
within the superconductor is close to zero.
The superconductor has to be cooled to the
extreme temperatures as stated above. Absolute
zero is -273.15 degrees Celsius and -459.67
degrees Fahrenheit. These are extreme
temperatures. The magnetic fields are not
running through the superconductor as they are
repelled around the superconductor which
causes the magnet to be able to float around
the track on its repelled magnetic field. The
meisnner effect is shown in the diagram below.
The left shows what the magnetic fields do
when its above to critical temperature, while
the right shows what it does when the
temperature is below the critical temperature.
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