Final answer:
An electromagnet is powered by electric current and uses an iron core to enhance its magnetic field.
Explanation:
An electromagnet is a type of magnet where the magnetic field is generated by electric current flowing through a coil of wire, often wrapped around an iron core. This contrasts with a permanent magnet, which maintains its magnetism without the need for an external electric current. Iron is commonly used as the core of an electromagnet because it enhances the magnetic field by concentrating the magnetic flux lines produced by the current.
Learn more about Electromagnets and Permanent Magnets here:
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