The image shows an electromagnet. how could you increase the strength of an electromagnet? a) use a larger nail. b) use a smaller nail. c) use a battery with less voltage. d) use fewer coils of wire around the nail.

A

To increase the strength of an electromagnet, use a larger nail to magnify the electromagnet in the field. Iron nails increase the current strength of the magnet, resulting to a stronger electromagnetic field.
Moreover, the use of battery with high voltage and use of more coils of wire around the nail will also increase the strength of an electromagnet.