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

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

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Electronic Principles
Current is

The flow of charged particles through a material
The number of free electrons in an atom
None of these
An imbalance of electrical charges
The force that causes electrons to flow

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