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

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

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Electronic Principles
The dielectric constant of a material is a measure of:

the amount of opposition to the current flow
the amount of voltage it can withstand before breaking down
how well the material concentrates electrostatic lines of force
None of these
how well the material concentrates magnetic lines of force

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

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Electronic Principles
The peak value of a sine waveform is:

the amplitude at 70.7% of the maximum value
the amplitude at 1.41 times the maximum value
the maximum positive or negative value
the amplitude at 90% of the maximum value
None of these

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
None of these
The amount of magnetic flux that is not confined to the core material of an electromagnet
The circular magnetic field that surrounds a conductor carrying a current
The force of attraction between the poles of a permanent and temporary magnetic field

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