Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

None of these
An electron has a positive charge and a proton has no charge
An electron has a negative charge and a proton has no charge
An electron has a negative charge and a proton has a positive charge
An electron has a positive charge and a proton has a negative charge

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

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

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

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

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