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

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

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

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

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Like magnetic poles attract, while unlike poles repel
Current is induced in a conductor that is moving through a magnetic field
None of these
Like magnetic poles repel, while unlike poles attract
Current flowing through a conductor generates a magnetic field

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