Electronic Principles
Which one of the following phrases most accurately describes a purely capacitive circuit?

The ac voltage leads the current by 90 degree
Combinations of resistance and capacitive reactance provide any opposition to current flow
Capacitive reactance provides the only opposition to current flow
None of these
Resistances provide the only opposition to current flow

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Electronic Principles
What is a negative ion?

None of these
An atom that contains more electrons than protons
An atom that contains more electrons than neutrons
An atom that contains more protons than electrons
An atom that contains more protons than neutrons

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Electronic Principles
The rms value of a sine waveform is:

the number of cycles completed in one second
equal to 1.41 times the peak amplitude
the time required to complete one full cycle
None of these
equal to 0.707 times the peak amplitude

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