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

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
Like magnetic poles attract, while unlike poles repel
Like magnetic poles repel, while unlike poles attract

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Electronic Principles
Which one of the following statements applies to common auto batteries?

Auto batteries are primary dry-cell batteries
Auto batteries are secondary dry-cell batteries
Auto batteries are secondary wet-cell batteries
Auto batteries are primary wet-cell batteries
None of these

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Electronic Principles
The total inductance of a series inductor circuit is:

equal to the sum of the individual inductance values
less than the value of the smallest inductor
equal to the source voltage divided by total current
None of these
equal to the sum of the individual inductive-reactance values

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