The current in a 60.0-mH inductor changes with time as I = 3.00t2 − 8.00t, where I is in amperes and t is in seconds. (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. (c) At what time is the emf zero?

The current in a 60.0-mH inductor changes with time as I = 3.00t2 − 8.00t, where I is in amperes and t is in seconds. (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. (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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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.

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Step 1: Determine the given variables

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Step 2: Calculate induced emf at time t=1.00 second

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Step 3: Calculate induced emf at time t=4.00 seconds

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Step 4: Calculate time when induced emf is zero

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