Electronic Principles
Current is

An imbalance of electrical charges
None of these
The number of free electrons in an atom
The force that causes electrons to flow
The flow of charged particles through a material

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Electronic Principles
What is the difference between a conductor and an insulator?

None of these
An insulator allows current to flow much easier than a conductor does
The difference between conductors and insulators depends on how they are used
An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
A conductor allows current to flow much easier than an insulator does

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

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

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