Electronic Principles
Thevenin theorem replaces a complicated circuit facing a load by an

Ideal current source and parallel resistor
None of these
Ideal current source and series resistor
Ideal voltage source and series resistor
Ideal voltage source and parallel resistor

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Electronic Principles
What is a free electron?

An electron that costs nothing
An electron that has no electrical charge
None of these
An electron that has been freed from its parent atom
An electron that has twice the amount of charge of a normal electron

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

The circular magnetic field that surrounds a conductor carrying a current
The force of attraction between the poles of a permanent and temporary magnetic field
The amount of magnetic flux that is not confined to the core material of an electromagnet
Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
None of these

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