Electronic Principles
Current can flow through a normally open push button switch as long as:

you are not pressing the button
you are pressing the button
its contact remain open
its contact remain open
None of these

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Electronic Principles
A circuit has a Norton current of 10 mA and a Norton resistance of 10 kW. What is the Thevenin circuit?

1000 V and a series resistance of 10 k Ohm
100 V and a parallel resistance of 10 k Ohm
1000 V and a parallel resistance of 10 kOhm
None of these
100 V and a series resistance of 10 k Ohm

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Electronic Principles
Waveforms are graphs that show:

frequency on the vertical axis and amplitude on the horizontal axis
the passage of time on the vertical axis and amplitude on the horizontal axis
amplitude on the vertical axis and the passage of time on the horizontal axis
amplitude on the vertical axis and frequency on the horizontal axis
None of these

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

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

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