Electronic Principles
To get the Norton current, you have to

Open the load resistor
Open the voltage source
Short the load resistor
Short the voltage source
None of these

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Electronic Principles
Which one of the following phrasers best describes flux density?

The opposition to a build-up of magnetic fields
The rate of change of the number of lines of magnetic force
None of these
The force that maintains lines of force
The concentration of lines of magnetic force

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Electronic Principles
A high-pass filter:

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

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