Chapter 25.2, Problem 23SSC

To determine

To Explain: Ifpermanent magnets would make goodtransformer cores.

Explanation of Solution

Introduction:

A magnetic core is used in the different types of devices like the transformers, electrical motors, generators.They are pieces made up of magnetic material and has high resistance to guide the magnetic fields in different electrical and magnetic devices.

The EMF which is induced in the transformer is dependent on the change in the magnetic field that passes through the core. Permanent magnets are constant because the magnets are made up of such kind of materialthat opposes this kind of changes. The permanent magnets cannot make the good transformer cores.

Conclusion:

Hence, the EMF which isinduced in the transformer is dependent on the change in the magnetic field that passes through the core. Permanent magnets are constant because the magnets are made up of such kind of materialthat oppose such kind of changes.