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

The voltage causes current to flow in two directions at the same time
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

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Electronic Principles
What is a negative ion?

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

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Electronic Principles
Voltage is

The number of free electrons in an atom
The smallest electrically charged particle
Trie force that causes electrons to flow
The flow of charged particles through a material
None of these

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