Electronic Principles
Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?

R = E2/P
P = E2/R
P = PR
I = P/E
None of these

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Electronic Principles
The south pole of a magnet is the one:

that would be attracted to the earth's south magnetic pole
that would be repelled by the north pole of another magnet
that would be attracted to the earths north magnetic pole
None of these
that has its molecules arranged in a random pattern

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Electronic Principles
A low-pass filter:

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

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Electronic Principles
Which one of the following statements is true for current flowing in a parallel circuit?

The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
The total current in a parallel circuit is always less than the smallest amount of current
None of these
The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
The same current always flows through every part of a parallel circuit

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Electronic Principles
Voltage is

The smallest electrically charged particle
The flow of charged particles through a material
The number of free electrons in an atom
None of these
Trie force that causes electrons to flow

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