# What is Eddy Current? Principle, Loss, Uses and Examples

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Hello, you are once again welcome on our physics website. today we are presenting another interesting article What is Eddy current? before this article on our website, we told you about electromagnetic induction and magnetic field in every detail. you can go through the articles so that you have a good knowledge about these topics before reading the Eddy current. This is the type of current that is wasteful. it is totally based on electromagnetic induction. To know more about What is Eddy current meaning, read the whole article from start to end.

Everyone as a science student must know about the Eddy current. We will here describe some important questions from the exam point of view such as What is Eddy Current, what is an eddy current, define eddy current, eddy currents definition, eddy current loss, eddy current transformer, etc. this article going to be important for you. So clear your every concept about the current. Let’s move on with our article without time waste.

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## What is Eddy current (Definition)?

As we all know that there is an induced EMF is produced in any coil at the time when there is a change in the flux associated with the coil. Eddy currents are currents that look like rounded eddies for Whirlpool. The property of a conductor is that when it is placed in a varying magnetic field, there is a production of induced current in that conductor and this type of current is known as Eddy current.

We can easily explain this in the way, Eddy currents are currents that make a loop of electrical current that is induced inside a conductor when it is placed in a changing magnetic field according to the law of induction of Faraday. Eddy current flow in a closed loop inside a conductor and in the perpendicular plane of the magnetic field.

## What is Eddy current loss?

There is an induced EMF is produced in any coil at the time when there is a change in the flux associated with the coil. we can say that when the conductor experiences the changing magnetic field, the circulating current is induced due to the induction of EMF. This induced current is known as Eddy current. this induced current is a useless current and can not use for any purpose. The Eddy currents only produce the heat inside the conductor, that’s why it is called eddy current loss.

## Uses and Examples of Eddy current

To know very well about what is Eddy current it is more necessary to know what is Faraday’s law of induction. Ed current is produced inside a conductor when it is placed in a changing magnetic field. Eddy current has the capacity to produce heat. The production of heat is so enough to melt any metal. This method is also used in the extraction of metals from their ores. some other uses of the Eddy current are given below –

### 1. Magnetic brakes

In this type of brake, when you are going to press the brakes the metal wheels get exposed to a strong magnetic field which generates Eddy current in the wheels of the vehicle. As the result, the Eddy current and magnetic field interact together and slow down the speed of the wheels.

### 2. Automobile speedometer

This is one of the best use of the Eddy current with the help of ID current Beacon also measure the speed of any vehicle automobile speedometer contains a rotating magnet that can root 8 according to the speed of the vehicle producing the Eddy current in the drum. When this drum takes a turn in the direction of that rotating magnet, the pointer connected with the drum indicates the vehicle’s speed.

### 3. Induction furnace

Nowadays the kitchen’s induction cookers are based on the principle of an Eddy current. Eddy current has the capacity to produce heat. The production of heat is so enough to melt any metal. This method is also used in the extraction of metals from their ores.

### 4. Free fall devices

Eddy current helps you to detect counterfeit coins and the notes used in the vending machine. Eddy current makes the speed of the coins slow down so that they will move past a stationary magnet.

### 5. Galvanometer

Galvanometer is a device that is used to measure a very small current. an oscillating coil inside the Galvanometer produces an Eddy current. The resistive force of this eddy current now opposes the oscillation of the coil and this process enables the coil to quickly maintain its equilibrium position.

### 6. Energy meters

You, everyone, have seen the electric power meter. There is a metal disc present in the electrical power and due to the production of Eddy current, is metal disc rotates inside the electric current by the changing alternating current in the coil.

## Some frequently asked questions (FAQs)

Ques. What is Eddy current?
Ans. Eddy current is the current produced in the coil due to the small loop current by the changing of the magnetic field.

Ques. Who is the discoverer of Eddy current?
Ans. the phenomena of Eddy current was discovered in 1851 by the great scientist French physicist Foucault. and the result of these currents is also known as Foucault currents.