Electronic Principles
Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?

100 Ohm
None of these
5 Ohm
6 Ohm
50 Ohm or more

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

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

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Electronic Principles
For a pure capacitor:

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

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