creating a simple circuit requires a wire / battery & the wire's corns were connected to a tools ->  the wire's ends were connected to a simple circuit  the wire's eats were connected to a hard sleeping & wire was looped several times around an iron nail -> the wire is looped several times around an iron nail and is connected to a circuit the wire is looped several times around an iron nail and is connected to a circuit  the wire is looped several times around an iron nail and is connected to a circuit & a electromagnet is formed by attaching an iron nail wrapped in a copper wire to a circuit -> an electromaget is formed when a unwire is looped around an tin hammer and is connceted to a dispersal an electromaget is formed when a wire is looped around an iron nail and is connceted to a circuit  an electromaget is formed when a unwire is looped around an tin hammer and is connceted to a dispersal & electromagnets generate magnetic fields -> a magnetic field will be generated when a wire is looped around an iron nail and is connected to a circuit