Ellie made an electromagnet with wire, a nail, and a 2.5-volt battery. The electromagnet attracted a paper clip from 2 inches away. What action will make the electromagnet weaker? (1 point) Responses She can use a thicker piece of wire. She can use a thicker piece of wire. She can use a higher voltage battery. She can use a higher voltage battery. She can wrap the wire more times around the nail. She can wrap the wire more times around the nail. She can decrease the number of coils around the nail. She can decrease the number of coils around the nail.
To make the electromagnet weaker, Ellie can decrease the number of coils around the nail. The strength of an electromagnet is directly proportional to the number of coils (turns of wire around the core) and to the current flowing through the wire. By reducing the number of coils, the magnetic field generated by the current will be less focused and intense, thereby weakening the electromagnet's ability to attract objects like a paper clip.
