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?

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

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Electronic Principles
Which one of the following statements best describes magnetic hysteresis?

Hysteresis is most apparent when a steady amount of current is lowing through the coil of an electromagnet
Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently
Hysteresis is most apparent when the core material is saturated
None of these
Hysteresis is the amount of magnetic flux that is not confined to the core material of an electromagnet

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Electronic Principles
Which one of the following statements best applies to a parallel RLC circuit?

The sum of the current is always less than the applied current
The voltage waveform for each component always has the same amplitude and phase as the applied voltage
None of these
The current waveform for each component always has the same amplitude and phase as the applied current
All of these

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

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

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