Electronics Fundamentals: Circuits, Devices & Applications
Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
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Chapter 11, Problem 1TFQ

Lenz’s law states that the amount of voltage induced in a coil is proportional to the rate of change of the magnetic field with respect to the coil.

Expert Solution & Answer
Check Mark
To determine

Whether the given statement is true or false.

Answer to Problem 1TFQ

The statement is false.

Explanation of Solution

Given:

The amount of voltage induced is proportional to the change of magnetic field.

According to the Lenz’s law the effect opposes the cause applied in the Faraday’s law.

According to the Faraday’s law of electromagnetic induction, when a conductor is placed in a variating magnetic field, an emf is induced across the conductor which is known as induced emf.

And if the circuit is closed then current started flowing in the circuit and that current is known is induced current.

  Eαdϕdt

Where Lenz’s law just gives the polarity of induced emf,

  Eαdϕdt

Where negative sign indicates that the induced emf and magnetic flux are opposite in direction.

Change in magnetic field is opposed by the induced emf.

Therefore, the given statement is false.

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Electronics Fundamentals: Circuits, Devices & Applications

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