Electronic Principles
What kind of battery is most likely included in a cordless electric knife?

None of these
Mercury-cell battery
Zinc-carbon battery
Nicad battery
Lead-acid battery

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Electronic Principles
A high-pass filter:

increases the level of all frequencies by a significant amount
passes lower-frequency signals and reduces higher-frequency signals
has no effect on ac signals
None of these
passes higher-frequency signals and reduces lower-frequency signals

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