Electronic Principles
What is a free electron?

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

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

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

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

The ac voltage lags the current by 90 degree
None of these
Resistances provide the only opposition to current flow
Inductive reactance provides the only opposition to current flow
Combinations of resistance and inductive reactance provide any opposition to current flow

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