Which is the best description of how to build an electromagnet

Answer 1

To build an electromagnet, you will need a soft iron core, insulated copper wire, and a power source such as a battery. Start by wrapping the copper wire around the iron core, making multiple turns to create a coil. Be sure to leave ends of the wire exposed for connecting to the power source. Once the coil is completed, connect the ends of the wire to the battery terminals to create a circuit. When the current flows through the wire, it creates a magnetic field around the coil, turning the iron core into a magnet. You can increase the strength of the electromagnet by adding more turns of wire or increasing the current flow.