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

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

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Electronic Principles
What is a negative ion?

An atom that contains more protons than neutrons
An atom that contains more electrons than protons
None of these
An atom that contains more electrons than neutrons
An atom that contains more protons than electrons

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