Electronic Principles
When a series RLC circuit is operating at its resonant frequency:

None of these
inductive reactance is greater than the capacitive reactance
inductive reactance is equal to the capacitive reactance
the difference between inductive and capacitive reactance is equal to the resistance
capacitive reactance is greater than the inductive reactance

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Electronic Principles
Which one of the following statements is true for the currents in a parallel RL circuit?

The total current leads the total voltage by less than 90
The total current is less than the sum of the currents through the resistance and inductance
None of these
The total current is equal to the sum of the currents through the resistance and inductance
The current always has the same amplitude and phase for every part of the circuit

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

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