Electronic Principles
What are the main parts of an atom?

Electrons, protons, and neutrons
Electrons, protons, and ions
None of these
Protons only
Electrons, ions, and neutrons

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Electronic Principles
Which one of the following statements applies to common auto batteries?

Auto batteries are primary dry-cell batteries
None of these
Auto batteries are primary wet-cell batteries
Auto batteries are secondary wet-cell batteries
Auto batteries are secondary dry-cell batteries

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Electronic Principles
Which one of the following phrasers best describes flux density?

The force that maintains lines of force
None of these
The opposition to a build-up of magnetic fields
The rate of change of the number of lines of magnetic force
The concentration of lines of magnetic force

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