What are eddy current and its application?
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Explanation:
Eddy currents (also called Foucault's currents) are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction. ... This effect is employed in eddy current brakes which are used to stop rotating power tools quickly when they are turned off.
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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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