The current in a 30.0-mH inductor changes with time as i = 3.00t2 − 5.00t, where i is in amperes and t is in seconds.Please make sure in the correct measurement ;) (a) Find the magnitude of the induced emf at t = 1.00 s.%3Dmv(b) Find the magnitude of the induced emf at t = 4.00 s.mv(c) At what time is the emf zero?

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Answered: (a) Find the magnitude of the induced…

(a) Find the magnitude of the induced emf at t = 1.00 s. (b) Find the magnitude of the induced emf at t = 4.00 s. mv (c) At what time is the emf zero?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter23: Faraday’s Law And Inductance

Section: Chapter Questions

Problem 35P

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Concept explainers

Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.

Question

The current in a 30.0-mH inductor changes with time as i = 3.00t² − 5.00t, where i is in amperes and t is in seconds.

Please make sure in the correct measurement ;)

(a) Find the magnitude of the induced emf at t = 1.00 s.
%3D
mv
(b) Find the magnitude of the induced emf at t = 4.00 s.
mv
(c) At what time is the emf zero?

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