An electromagnet is a temporary magnet where the magnetic field is created by an electric current flowing through a wire coil, typically wrapped around a magnetic core like iron. Unlike a permanent magnet, which is always active, an electromagnet acts like a switch; its magnetic force only exists when the electricity is turned on, allowing it to be instantly activated or deactivated. This unique ability to control magnetic power makes them crucial for modern technology, powering everything from huge industrial cranes that lift scrap metal to the tiny components inside speakers, electric motors, and MRI machines.
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