Electronic Principles
The peak value of a sine waveform is:

None of these
the maximum positive or negative value
the amplitude at 1.41 times the maximum value
the amplitude at 70.7% of the maximum value
the amplitude at 90% of the maximum value

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Electronic Principles
Which one of the following principles best describes the basic operation of a generator?

Current is induced in a conductor that is moving through a magnetic field
Current flowing through a conductor generates a magnetic field
Like magnetic poles attract; unlike poles repel
None of these
Like magnetic poles repel; unlike poles attract

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

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
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
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
None of these

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