Electronic Principles
What is the smallest number of polarities required for current flow?

Three - negative, positive and neutral terminals
Two - a negative terminal and a positive terminal
One - a negative terminal
None of these
Four - two negative and two positive

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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 attracted to the earth's south magnetic pole
that would be repelled by the north pole of another magnet
None of these
that would be attracted to the earths north magnetic pole

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