Electronic Principles
Which one of the following kinds of materials has the highest permeability?

A ferromagnetic material
None of these
A diamagnetic material
All of these
A paramagnetic material

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Electronic Principles
What is a free electron?

An electron that has been freed from its parent atom
An electron that has twice the amount of charge of a normal electron
An electron that costs nothing
None of these
An electron that has no electrical charge

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