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

None of these
The ac voltage leads the current by 90 degree
Resistances provide the only opposition to current flow
Combinations of resistance and capacitive reactance provide any opposition to current flow
Capacitive reactance provides 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?

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

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