Applications of Superconductor Video Lecture - Civil Engineering (CE)

applications of superconductors
superconductivity is a phenomena of
exactly zero electrical resistance and
expulsion of magnetic fields occurring
in certain materials when cooled below a
characteristic critical temperature
generally the electrical resistivity of
an ordinary metallic conductor decreases
gradually as temperature is lowered even
near absolute zero a real sample of a
normal conductor shows some resistance
but in a superconductor the resistance
drops abruptly to zero when the material
is cooled below its critical temperature
an electric current flowing through a
loop of superconducting wire can persist
indefinitely with no power source this
property of a superconductor has enabled
us to use superconductors in many
applicants and machines and a
superconductor have many uses in the
modern world some of the major
applications of superconductors are
electromagnets superconductors are some
of the most powerful electromagnets
known these magnets are used for
magnetic separation when a
superconducting magnet is placed over a
mixture of weakly magnetic particles and
less or non-magnetic particles the weak
magnetic particles gets attracted to the
superconducting magnet
magnetic levitation a superconductor
repels the magnetic lines when cooled
below the critical temperature that is
it repels a magnet when approached
toward set this property is used in
operating maglev trains maglev is short
for magnetic levitation the tracks are
supported with propulsion coil and
levitation and guidance coil the Train
in its base has superconductor magnets
since the superconductor repels a magnet
the maglev train floats in the air using
the propulsion coil and the magnets
placed in the base of the Train the
Train moves over the tracks