Electronic Principles
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

The voltage reverses polarity periodically
The voltage remains at one polarity but changes value periodically
None of these
The voltage remains at one polarity and at a steady level
The voltage causes current to flow in two directions at the same time

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Electronic Principles
Molecule is

A atom that has an excessive number of electrons in its outer orbit
The smallest particle of a substance that retains the properties of that substance
A atom that flows whenever there is an imbalance of electrical charges between two points
None of these
A atom that has a shortage of electrons in its outer orbit

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

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

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