Scelta multipla
In the context of magnets and magnetic fields, all of the following can produce a magnetic field except which one?
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28. Magnetic Fields and Forces
Magnets and Magnetic Fields
Scelta multipla
In the context of magnets and magnetic fields, which of the following metals is strongly ferromagnetic at room temperature?
A
Copper (Cu)
B
Iron (Fe)
C
Aluminum (Al)
D
Gold (Au)
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Understand the concept of ferromagnetism: Ferromagnetic materials have magnetic domains that can align parallel to each other, resulting in a strong net magnetic field even without an external magnetic field.
Recall common ferromagnetic metals: The most well-known ferromagnetic metals at room temperature are Iron (Fe), Cobalt (Co), and Nickel (Ni).
Analyze the given options: Copper (Cu), Aluminum (Al), and Gold (Au) are not ferromagnetic; they are either diamagnetic or paramagnetic, meaning they do not exhibit strong permanent magnetism.
Identify Iron (Fe) as the metal that is strongly ferromagnetic at room temperature because it has unpaired electrons and magnetic domains that align easily.
Conclude that among the options, Iron (Fe) is the correct choice for a strongly ferromagnetic metal at room temperature.
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