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

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

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

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