The core of an electromagnet is typically ferromagnetic, while magnets can lose magnetism due to various factors. Storing magnets properly can prevent gradual loss of magnetism. Electromagnets provide the advantage of easy magnetic field manipulation using electric current.
The core of an electromagnet is typically made of ferromagnetic material such as iron. Using a ferromagnetic core can significantly strengthen the magnetic field produced by the electromagnet. Aligning the domains in the core helps create magnetism where the poles align with the electromagnet.
Magnets can lose their magnetism through various factors such as heat, physical damage, or exposure to strong magnetic fields. To prevent gradual loss of magnetism, magnets should be stored in a cool, dry place away from heat sources and other magnets. Storing magnets in pairs with opposite poles facing each other can help maintain their magnetism over time.
Electromagnets offer the advantage of rapid manipulation of the magnetic field using electric current. This allows for controlling the strength and direction of the magnetic field more easily compared to permanent magnets.
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