Electronic Principles
The direction of electron current flow is:

from neutral to positive
from negative to positive
from positive to negative
None of these
from right to left

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Electronic Principles
Which one of the following is a statement of Kirchhoffs current law?

The current through a resistance is proportional to the value of resistance and the IR drop across it
The algebraic sum of currents entering and leaving a point is equal to zero
None of these
The total current in a parallel circuit is less than the value of the smallest current
The algebraic sum of currents in a loop is equal to zero

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Electronic Principles
A high-pass filter:

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

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Electronic Principles
In a pure inductor:

ac current lags the voltage by 90 degree
ac current leads the voltage by 90 degree
ac current and voltage are exactly in phase
None of these
ac current is converted to dc voltage

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