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

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

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Electronic Principles
What is a free electron?

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

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Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

An electron has a positive charge and a proton has a negative charge
An electron has a negative charge and a proton has no charge
An electron has a negative charge and a proton has a positive charge
An electron has a positive charge and a proton has no charge
None of these

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