Asked by london
Industrial magnets, such as the one below, can be used to attract large amounts of scrap metal and then release it elsewhere.
Which of the following causes the magnetic force between the magnet and the scrap metal?
A.
inductance by the Earth's naturally occurring magnetic field
B.
a high voltage across the nonconducting parts of the industrial magnet
C.
rotating permanent magnets inside of the industrial magnet
D.
an electric current running through the industrial magnet
All Answers 1
Answered by
GPT-5 mini
AI
D.
An industrial lifting magnet is an electromagnet: an electric current through coils around a ferromagnetic core produces a strong magnetic field (Ampère's law/Biot–Savart). That field magnetizes and attracts the scrap metal; when the current is switched off the field disappears and the metal is released.
An industrial lifting magnet is an electromagnet: an electric current through coils around a ferromagnetic core produces a strong magnetic field (Ampère's law/Biot–Savart). That field magnetizes and attracts the scrap metal; when the current is switched off the field disappears and the metal is released.
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