Self Induced EMF

Definition: Self-induced emf is the e.m.f induced in the coil due to the change of flux produced by linking it with its own turns. This phenomenon of self-induced emf can be further understood by the following example given below: Consider a coil having N number of turns as shown in the above figure. When the …

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Magnetic Flux

Definition: The number of magnetic lines of forces set up in a magnetic circuit is called Magnetic Flux. It is analogous to electric current, I in an electric circuit. Its SI unit is Weber (Wb) and its CGS unit is Maxwell. It is denoted by φm. The magnetic flux measures through flux meter. The fluxmeter …

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Induced EMF

An Electromotive Force or EMF is said to be induced when the flux linking with a conductor or coil changes. This change in flux can be obtained in two different ways; that is by statically or by dynamically induced emf. They are explained below Contents: Statically Induced Electromotive Force Dynamically Induced Electromotive Force 1. STATICALLY …

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Permeance

Definition: It is the measure of the ease with which flux can be set up in a material. In other words, it measures the magnitude of the flux for the number of turns in an electric circuit. The permeance is analogous to the conductance in an electrical circuit. It is given as the reciprocal of …

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Magnetic Reluctance

Definition: The obstruction offered by a magnetic circuit to the magnetic flux is known as reluctance. As in electric circuit, there is resistance similarly in the magnetic circuit, there is a reluctance, but resistance in an electrical circuit dissipates the electric energy and the reluctance in magnetic circuit stores the magnetic energy. Also in an …

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Magnetomotive Force

Definition: The current flowing in an electric circuit is due to the existence of electromotive force similarly magnetomotive force (MMF) is required to drive the magnetic flux in the magnetic circuit. The magnetic pressure, which sets up the magnetic flux in a magnetic circuit is called Magnetomotive Force. The SI unit of MMF is Ampere-turn …

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Coefficient Of Coupling

The fraction of magnetic flux produced by the current in one coil that links with the other coil is called the coefficient of coupling between the two coils. It is denoted by (k). Two coils are taken coil A and coil B, when current flows through one coil it produces flux; the whole flux may …

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