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Creating a magnet with a nail and a battery, you can create a temporary magnet by winding a wire around the nail and connecting the ends of the wire to the positive and negative ends of a battery (DC source). When the battery is turned on, direct current flows through the wire, creating a magnetic field around the nail, turning it into a temporary magnet. This effect can be used in various applications such as electric motors and generators.


An electromagnet is a device that creates a magnetic field when electric current flows through a conductor. The physical principle of an electromagnet is that current flowing through a conductor creates a magnetic field around it. If the winding of the wire through which the current flows is made circular or spiral and magnetic material is placed inside this winding, the magnetic field created will become stronger. This is because the magnetic material amplifies the magnetic field flowing through it.

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