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

that would be attracted to the earth's north magnetic pole
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 south pole of another magnet

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Electronic Principles
The peak value of a sine waveform is:

the maximum positive or negative value
the amplitude at 70.7% of the maximum value
the amplitude at 1.41 times the maximum value
None of these
the amplitude at 90% of the maximum value

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