Electronic Principles
A real voltage source has

Zero internal resistance
A small internal resistance
A large internal resistance
None of these
Infinite internal resistance

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Electronic Principles
Which one of the following principles best describes the basic operation of a generator?

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

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

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