Electronic Principles
A device that converts mechanical pressure to electrical energy is called a:

photodiode
None of these
piezoelectric device
solar cell
nicad cell

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

None of these
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
that would be attracted to the earths north magnetic pole

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