Electronic Principles
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

0.1 A
0.41666666666667
100 A
1000 A
None of these

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

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

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Electronic Principles
A high-pass filter:

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

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