Electronic Principles
What form of energy is used to maintain an imbalance of charges between the terminals of a battery?

Electronical energy
None of these
Solar energy
Mechanical energy
Chemical energy

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Electronic Principles
The period of a waveform is:

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

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