Electronic Principles
What kind of battery is most likely included in a cordless electric knife?

None of these
Mercury-cell battery
Zinc-carbon battery
Lead-acid battery
Nicad battery

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

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
None of these
The force that maintains lines of force

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Electronic Principles
Molecule is

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

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