Electronic Principles
Current is

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

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

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

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