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

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Electronic Principles
In a pure inductor:

None of these
ac current is converted to dc voltage
ac current and voltage are exactly in phase
ac current leads the voltage by 90 degree
ac current lags the voltage by 90 degree

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