A mechanic dropped a bolt he needed to repair a car motor. He decided to make a simple electromagnet to try to attract the metal bott. Which list of material would make the best electromagnet?
A. metal rod for a core, copper wire, 9-volt battery
OB glass rod for a core, copper wire, 9-volt battery
OC. plastic rod for a core, copper wire, 9-voit battery
OD. wooden rod for a core, copper wire, 9-volt battery
A. metal rod for a core, copper wire, 9-volt battery
Metal is a good conductor of electricity and will enhance the magnetic properties of the electromagnet.