Electronic Principles
A device that converts mechanical pressure to electrical energy is called a:

solar cell
None of these
piezoelectric device
nicad cell
photodiode

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Electronic Principles
The period of a waveform is:

the time required for the voltage to rise from 10% to 90% of the peak amplitude
None of these
the number of cycles completed in one second
equal to 0.707 times the peak amplitude
the time required to complete one full cycle

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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
A atom that flows whenever there is an imbalance of electrical charges between two points
None of these
The smallest particle of a substance that retains the properties of that substance

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