Video narration
How could a simple wire make a paper clip move, like the magnet on your fridge? A wire carrying electric current creates an invisible magnetic field around itself. You cannot see it, but a compass can detect it, or magnetic materials can respond to it. Here is the surprising turn: current does not just carry energy through a wire. It also creates magnetism around it. Coil the wire, and the fields from each loop reinforce one another. Add an iron core, and the field becomes stronger. Now you have an electromagnet: magnetism produced by current and controlled by switching it on or off. This effect helps motors create motion, speakers make sound, and relays switch circuits. Reverse the current, and the magnetic effect reverses too. So how can a wire make something move? Current creates the field, and a coil turns that field into an electromagnet.