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

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

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Electronic Principles
What is a negative ion?

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

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