temporary magnet
[/ˈtɛmpəreri ˈmæɡnət/]
nounpl: temporary magnets
ímã temporário
1. A magnet that produces a magnetic field only when an external magnetic field is applied or when an electric current flows through it; loses its magnetism when the external field is removed
An electromagnet is a type of temporary magnet that only functions when electricity is supplied.
Um eletroímã é um tipo de ímã temporário que funciona apenas quando a eletricidade é fornecida.
2. A ferromagnetic material that has been magnetized but does not retain permanent magnetization
Soft iron acts as a temporary magnet and loses its magnetic properties quickly after the magnetizing force is removed.
O ferro mole funciona como um ímã temporário e perde suas propriedades magnéticas rapidamente após a remoção da força magnetizadora.
This term is primarily used in academic and technical contexts in both Brazil and the USA. In Brazilian schools and universities, the concept is commonly taught as part of physics curricula. The distinction between temporary and permanent magnets is fundamental to understanding electromagnetism and is relevant in industrial applications such as electromagnets used in motors, transformers, and magnetic separation equipment.
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