Electronic Principles
The period of a waveform is:

equal to 0.707 times the peak amplitude
the time required for the voltage to rise from 10% to 90% of the peak amplitude
the number of cycles completed in one second
None of these
the time required to complete one full cycle

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

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

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

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
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

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