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An inductor has inductance of 0.260 $\mathrm{H}$ and carries a current that is decreasing at a uniform rate of 18.0 $\mathrm{mA} / \mathrm{s} .$ Find the self-induced emf in this inductor.

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The self induced emf of inductor $(\varepsilon)=0.00468 \mathrm{V}$

Physics 102 Electricity and Magnetism

Chapter 21

Electromagnetic Induction

Current, Resistance, and Electromotive Force

Direct-Current Circuits

Magnetic Field and Magnetic Forces

Sources of Magnetic field

Inductance

Alternating Current

Cornell University

University of Michigan - Ann Arbor

University of Winnipeg

McMaster University

Lectures

03:27

Electromagnetic induction is the production of an electromotive force (emf) across a conductor due to its dynamic interaction with a magnetic field. Michael Faraday is generally credited with the discovery of electromagnetic induction in 1831.

08:42

In physics, a magnetic field is a vector field that describes the magnetic influence of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H, where H is measured in units of amperes per meter (usually in the cgs system of units) and B is measured in teslas (SI units).

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The inductor in $\textbf{F…

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The inductor in Fig. E30.1…

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Find the induced emf when …

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A coil with a self-inducta…

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At the instant when the cu…

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The current in an inductor…

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An inductor in the form of…

So from Faraday's law, we know that the IMF equals the induct inst times, the absolute value of the change and current with respect to time. And we can actually just solve directly. So 0.260 Henry's times 18.0 times 10 to the negative third amps per second. And this is going to give us and the IMF of 4.68 times 10 to the negative third volts. So this would be the IMF, the induced EMF. That is the end of the solution. Thank you for watching.

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