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 bolt which lost of material would make the best electromagnet? A. Metal rod for a core copper wire and 9 volt battery b. Glass rod for a core copper wire and 9 volt battery c. Plastic rod for a core copper wire and 9 volt battery d. Wooden rod for a core copper wire and 9 volt battery
A. Metal rod for a core copper wire and 9 volt battery
Metal is a good conductor of electricity and will create a stronger magnetic field when combined with copper wire and a 9 volt battery. Glass, plastic, and wood are not good conductors of electricity so they would not be effective materials for creating an electromagnet.