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

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
The circular magnetic field that surrounds a conductor carrying a current
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?

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

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Electronic Principles
The total inductance of a series inductor circuit is:

equal to the sum of the individual inductance values
None of these
equal to the sum of the individual inductive-reactance values
less than the value of the smallest inductor
equal to the source voltage divided by total current

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