Electronic Principles
Which one of the following devices is most often used for measuring opposition to current flow in a circuit?

Ohmmeter
Wattmeter
None of these
Voltmeter
Ammeter

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Electronic Principles
A low-pass filter:

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

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