residual magnetism

American  

noun

Electricity.

1. remanence.

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Etymology

Origin of residual magnetism

First recorded in 1830–40

Example Sentences

Residual Magnetism.—When a mass of iron has once been magnetized, it becomes a difficult matter to entirely remove all traces when the magnetizing agent has been removed, and, as a general rule, a small amount of magnetism is permanently retained by the iron.

From Project Gutenberg

This is known as residual magnetism, and it varies in amount with the quality of the iron.

From Project Gutenberg

Well annealed, pure wrought iron, as a rule, possesses very little residual magnetism, while, on the other hand, wrought iron, which contains a large percentage of impurities, or which has been subjected to some hardening process, such as hammering, rolling, stamping, etc., and cast iron, possess a very large amount of residual magnetism.

From Project Gutenberg

Residual magnetism in iron is of great importance in the working of the self-exciting dynamo, and is, indeed, the essential principle of this class of machine.

From Project Gutenberg

That is, without residual magnetism in the field magnet core, the dynamo when started would not generate any current unless it received an initial excitation from an external source.

From Project Gutenberg