Faraday’s law of Electromagnetic Induction

Faraday’s law of Electromagnetic Induction

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The electromagnetic induction heating or induction heating is the process of moving in accordance with a fixed position, and the magnetic field continues to change, or that the magnetic field is stationary and the conductor moves. This means that the voltage, or electromagnetic fields (electromotive force) of the electricity in the wire. Michael Faraday discovered the Law of Induction in 1830. Let us now proceed to consider in detail the Electro-magnetic induction.

states that current will be induced in a conductore which is exposed to a change in magnetic field. Faraday’s law of electromagnetic induction consists of two laws. 

  • The first law describe the induction of  emf in a conductore.
  • The second law describe the emf produced in the conductore.
Faraday's law of Electromagnetic Induction
Faraday’s law of Electromagnetic Induction
This is the law of electromagnetic induction discovered by Michael Faraday. What does it lead wire according to the configuration of which is provided to the device, in order to measure the voltage in the circuit. So, when the bar magnet passes, the hips, the circuit voltage to be measured. The significance of this is that it is in the style of, in order to generate electrical energy in a circuit by means of a magnetic field, not only with new batteries. Machinery, such as generators, transformers, and motors work on the principle of electromagnetic induction.

Faraday’s first law of Electromagnectic Induction :

Whenever the number of magnetic lines of induction or magnetic flux through a close circuit changes ,an emf is induced in the circuit.

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Faraday’s Second Law:

The magnitude of induced emf in a circuit is directly proportional to the rate of change of magnetic flux bed up with the closed circuit and exists so long as the change in the flux linked up with the circuit continuous.

Induced emf:

Whenever the magnetic flux through the circuit changes by an amount dϕ in time dt then induced emf  E ∝-dϕ/dt ; E=-kdϕ/dt.

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Len’s Law :

The direction of the induced emf in the circuit is given by Len’s law .It states that “The direction of induced emf is always such that it tends to oppose the change that causes it.”

Len’s law and Conservation of Energy:

According to Len’s law , the induced emf opposes the change that produces it.When the north pole of a magnet is brought near a coil ,the current induced will oppose the movement of the magnet by creating a north pole on the face of the coil near the north pole of the magnet.
Similarly when the north pole is taken away,the current induced will oppose the movement of the magnet by creating a south pole on the face of the coil near the magnet.
In both cases ,work has to be done in moving the magnet against the repultion or attraction respectively by the cost of mechanical energy.It is the mechanical energy which converted into electrical energy .Thus the len’s law is in accordance with the conservation of energy.

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faraday%2527s%2Blaw. Faraday's law of Electromagnetic Induction

Application of Faraday’s Law:

  • By inducing an electromotive force into an electromagnetic flow, the velocity of the fluid is recorded.
  • Transformers work on the basis of Faraday’s Law.
  • Induction cooker also work on the principle of Faraday’s law.
  • The basic working principle of the electrical Generatore is based on Faraday’s law.
  • It is also used in the musical instruments.

As the current in the coil, it creates a changing magnetic field around it. When two or more coils are magnetically coupled to each other, alternating current that passes through a coil causes an induced EMF of the second, which is connected to the coils. This phenomenon is known as mutual induction.

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