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

Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
None of these
Primary-cell batteries can be recharged and used many times, whereas secondary-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

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Electronic Principles
Waveforms are graphs that show:

None of these
amplitude on the vertical axis and the passage of time on the horizontal axis
the passage of time on the vertical axis and amplitude on the horizontal axis
amplitude on the vertical axis and frequency on the horizontal axis
frequency on the vertical axis and amplitude on the horizontal axis

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Electronic Principles
The dielectric constant of a material is a measure of:

None of these
how well the material concentrates magnetic lines of force
the amount of opposition to the current flow
how well the material concentrates electrostatic lines of force
the amount of voltage it can withstand before breaking down

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