what is the difference between 'eddy current" and "induced emf"? or both refers to same phenomena?

Question

whether their method of production is same or not?
tell me about eddy current loss in transformer & its principle?

Answer 1

there is large difference between EDDY CURRENTS and INDUCED EMF.major difference is that eddy currents are currents induced in the conductors when magnetic flux linked with conductor changes .reason for eddy current is induced EMF only.
induced EMF=rate of change of flux.
eddy current=rate of change of flux/resistance of conductor.

Answer 2

An eddy current (also known as Foucault current) is a phenomenon discovered by a French physicist Léon Foucault in 1851. It is caused by a moving magnetic field intersecting a conductor or vice-versa. The relative motion causes a circulating flow of electrons, or current, within the conductor. These circulating eddies of current create electromagnets with magnetic fields that oppose the change in the external magnetic field law).

Electromotive force (emf) is defined as the amount of energy gained per unit charge that passes through a device in the opposite direction to the electric field produced by that device. It is measured in volts.

It is about the same thing that you do but the emf is more a vector than eddy current. I the measured eddy current is emf.

Answer 3

eddy currents are caused by irregularities in the magnetic flux. These are circular currents that cause undue energy losses. However induced emf is no such harmful occurance. It is the operation of the t/former that induces emf on the secondary coil.

Answer 4

An eddy current is the current is induced in little swirls ("eddies") on a large conductor (picture a sheet of copper).
If a large conductive metal plate is moved through a magnetic field which intersects perpendicularly to the sheet, the magnetic field will induce small "rings" of current which will actually create internal magnetic fields opposing the change. This is why a large sheet of metal swung through a strong magnetic field will stop as it starts to move through the field. All of its kinetic energy will cause a major change in the magnetic field as it enters it which will induce rings of current which will oppose the surrounding magnetic field and slow the object down. In effect, the kinetic energy will go into driving small currents inside the metal which will give off that energy as heat as they push through the metal.

Electromotive force (emf) is defined as the amount of energy gained per unit charge that passes through a device in the opposite direction to the electric field produced by that device. It is measured in volts.

Sources of electromotive force include electric generators (both alternating current and continuous current types), batteries, and thermocouples (in a heat gradient). [1] Electromotive force is often denoted by or ℰ (script capital E).

Electromotive force is measured in volts (in the International System of Units equal in amount to a joule per coulomb of electric charge). Electromotive force in electrostatic units is the statvolt (in the centimeter gram second system of units equal in amount to a erg per electrostatic unit of charge).

Answer 5

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Answer 6

Refer NCERT class XII text book-Electromagnetic induction
} Dinesh millenium physics for class XII
Fundamentals of physics -REsnick&halliday(published by john wiley and sons)

Answer 7

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