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

None of these
Solar energy
Electronical energy
Mechanical energy
Chemical energy

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Electronic Principles
The period of a waveform is:

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

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