Electronic Principles
Current is

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

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Electronic Principles
The south pole of a magnet is the one:

that has its molecules arranged in a random pattern
that would be repelled by the north pole of another magnet
that would be attracted to the earths north magnetic pole
that would be attracted to the earth's south magnetic pole
None of these

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

None of these
The force of attraction between the poles of a permanent and temporary magnetic field
The amount of magnetic flux that is not confined to the core material of an electromagnet
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
The circular magnetic field that surrounds a conductor carrying a current

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