What are eddy currents? Write its applications.
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Answered by
14
Hey there!!!
■ EDDY CURRENT:
=========================
The induced current produced in the bulk pieces of conductor when magnetic flux through the conductor changes , is called eddy current.
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■ APPLICATIONS:
=============================
☆ Elecromagnetic damping:
• Dead beat galvanometer: This is used to bring the needle of galvanometer at rest readily. These types of galvanometers are called dead beat galvanometers.
• A magnet passing through Aluminium pipe will take longer time to reach its base due to eddy currents.
☆ Induction furnace: High temperatures are achieved through induced currents produced in furnaces for making the alloys.
Same principle is used in the induction stove.
☆ Magnetic breaking :It is used in the magnetic trains where large magnets are situated below the trains to produce eddy currents which help in breaking.
There is very less energy loss because there is no mechanical linkage involved in breaking.
☆ It is used to rotate the disc in the electric power meter and it is also used in speedometer.
HOPE IT HELPS!!!
# RUHANIKA
■ EDDY CURRENT:
=========================
The induced current produced in the bulk pieces of conductor when magnetic flux through the conductor changes , is called eddy current.
__________________________________
■ APPLICATIONS:
=============================
☆ Elecromagnetic damping:
• Dead beat galvanometer: This is used to bring the needle of galvanometer at rest readily. These types of galvanometers are called dead beat galvanometers.
• A magnet passing through Aluminium pipe will take longer time to reach its base due to eddy currents.
☆ Induction furnace: High temperatures are achieved through induced currents produced in furnaces for making the alloys.
Same principle is used in the induction stove.
☆ Magnetic breaking :It is used in the magnetic trains where large magnets are situated below the trains to produce eddy currents which help in breaking.
There is very less energy loss because there is no mechanical linkage involved in breaking.
☆ It is used to rotate the disc in the electric power meter and it is also used in speedometer.
HOPE IT HELPS!!!
# RUHANIKA
Answered by
4
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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