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

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
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
None of these
The force of attraction between the poles of a permanent and temporary magnetic field

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Electronic Principles
Waveforms are graphs that show:

amplitude on the vertical axis and the passage of time on the horizontal axis
amplitude on the vertical axis and frequency on the horizontal axis
frequency on the vertical axis and amplitude on the horizontal axis
the passage of time on the vertical axis and amplitude on the horizontal axis
None of these

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

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

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Electronic Principles
Which one of the following statements applies to common, non-rechargeable flashlight batteries?

Common flashlight batteries are secondary wet-cell batteries
None of these
Common flashlight batteries are primary wet-cell batteries
Common flashlight batteries are primary dry-cell batteries
Common flashlight batteries are secondary dry-cell batteries

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