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

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

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Electronic Principles
Molecule is

A atom that has an excessive number of electrons in its outer orbit
A atom that flows whenever there is an imbalance of electrical charges between two points
The smallest particle of a substance that retains the properties of that substance
None of these
A atom that has a shortage of electrons in its outer orbit

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