Electronic Principles
Current is

The force that causes electrons to flow
The flow of charged particles through a material
The number of free electrons in an atom
An imbalance of electrical charges
None of these

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Electronic Principles
A high-pass filter:

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

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Electronic Principles
Which one of the following statements is true for the voltages in a series RC circuit?

The total voltage is less than the sum of the voltages across the resistance and capacitance
The total voltage is equal to the sum of the voltages across the resistance and capacitance
None of these
The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is greater than the sum of the voltages across the resistance and capacitance

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