Electronic Principles
Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff?

30 Ohm
20 Ohm
100 Ohm
None of these
10 Ohm

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Electronic Principles
A low-pass filter:

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

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Electronic Principles
The total inductance of a series inductor circuit is:

less than the value of the smallest inductor
equal to the sum of the individual inductive-reactance values
None of these
equal to the sum of the individual inductance values
equal to the source voltage divided by total current

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

The ac voltage lags the current by 90 degree
Combinations of resistance and inductive reactance provide any opposition to current flow
Inductive reactance provides the only opposition to current flow
Resistances provide the only opposition to current flow
None of these

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