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

solar cell
None of these
electric device
chemical cell
thermocouple

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Electronic Principles
Which one of the following phrases most accurately describes a purely capacitive circuit?

Resistances provide the only opposition to current flow
Combinations of resistance and capacitive reactance provide any opposition to current flow
The ac voltage leads the current by 90 degree
None of these
Capacitive reactance provides the only opposition to current flow

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Electronic Principles
Voltage is

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

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Electronic Principles
What is the primary difference between primary and secondary cell batteries?

Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
None of these
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries

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