Electronic Principles
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

The voltage causes current to flow in two directions at the same time
None of these
The voltage remains at one polarity and at a steady level
The voltage reverses polarity periodically
The voltage remains at one polarity but changes value periodically

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Electronic Principles
Which one of the following statements applies to common auto batteries?

None of these
Auto batteries are secondary dry-cell batteries
Auto batteries are secondary wet-cell batteries
Auto batteries are primary dry-cell batteries
Auto batteries are primary wet-cell batteries

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