What are Eddy currents? What are its applications?
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these currents generated on a surface in circukar wave like,they produce intense heat,kaninated cire are used to check eddy curreNTS.
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Eddy currents :
(a) Observed first by Foucalt in 1895.
(b)When a mass of a metal moves in
a magnetic field or when the
magnetic field through a
stationary mass of a metal
is altered, induced current is
produced in the metal.
(c) This induced current flows in the
metal in the form of closed loops
resembling whirlpool or eddies.
(d) These are known as eddy
currents or Foucault current.
(e) Direction of eddy current is given
by Lenz's law.
Applications of eddy current :
(a) Dead beat galvanometer
(b) Induction furnace
(c) Induction motors
(d) Electro magnetic brakes
(e) Speedometer
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