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A magnet created by tightly coiling wire around an iron nail is called an electromagnet. When electric current flows through the coiled wire, it generates a magnetic field, which magnetizes the iron nail. This magnetic field can be turned on or off by controlling the flow of electricity, making electromagnets useful in various applications such as motors, Transformers, and magnetic locks. The strength of the electromagnet can be increased by adding more coils or increasing the current.

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8mo ago

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