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Chapter 23: Q23.1-1CQ (page 857)

How do the multiple-loop coils and iron ring in the version of Faraday鈥檚 apparatus shown in Figure 23.3 enhance the observation of induced emf?

Short Answer

Expert verified

The majority of the magnetic field produced by the first loop is directed through the iron core and into the secondary coil.

Step by step solution

01

Definition of Faraday's law

Faraday's law of induction is an fundamental law of electromagnetism that predicts how a magnetic field interacts with an electric circuit to produce an electromotive force, a process known as electromagnetic induction.

02

Explanation

Iron has a very high relative permeability. As a result, the majority of the magnetic field generated by the first loop flows through the iron core and into the secondary coil.

Additionally, multiple coil turns increase the effective surface area with which the magnetic field interacts, resulting in a higher induced current in the secondary coil.

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