What is eddy current?

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Eddy currents are loops of electrical current induced within conductors by a changing magnetic field in the conductor due to Faraday's law of induction.

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Esa current jo apne aap produce ho due to change in Magnetic flux... These are also called foucault currents because they discoverd by foucault...!! There are some applications like Jumping disk, speedometer  etc you can understand much better by reading these examples from books !

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It is D current which opposes the motion of a metal piece when magnetic field is set up.

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Thank U

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Eddy Current: An Overview
Eddy currents are loops of electrical current that are induced in conductors when exposed to a changing magnetic field. This phenomenon occurs due to Faraday's law of electromagnetic induction.
How Eddy Currents are Formed
- When a conductor (like copper or aluminum) moves through a magnetic field or when the magnetic field around a stationary conductor changes, an electromotive force (EMF) is generated.
- This induced EMF causes circulating currents, known as eddy currents, to flow within the conductor.
Characteristics of Eddy Currents
- Direction: The direction of eddy currents is such that it opposes the change in the magnetic field, according to Lenz's Law.
- Heat Generation: Eddy currents produce heat due to the resistance of the conductor, which can be beneficial in applications like induction heating but can also lead to energy losses.
Applications of Eddy Currents
- Induction Heating: Utilized in cooking appliances and metal hardening processes.
- Eddy Current Testing: A non-destructive testing method used to detect flaws in conductive materials.
- Magnetic Braking: Employed in trains and amusement park rides to slow down the motion without physical contact.
Challenges with Eddy Currents
- Energy Loss: Eddy currents can result in significant energy losses in electrical devices, like transformers and motors.
- Mitigation Techniques: Laminating materials or using ferrite cores can reduce the effects of eddy currents.
Understanding eddy currents is crucial for optimizing performance in electrical systems and for innovative applications in various fields.

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