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?

20 Ohm
None of these
100 Ohm
10 Ohm
30 Ohm

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

None of these
The force of attraction between the poles of a permanent and temporary magnetic field
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
The amount of magnetic flux that is not confined to the core material of an electromagnet
The circular magnetic field that surrounds a conductor carrying a current

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

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

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