Betty made a simple electromagnet using just a battery and a wire. What could Betty do to increase the strength of her electromagnet?

Coil the wire around a nail.
Coil the wire around a toothbrush.
Coil the wire around a paper towel roll.
Coil the wire around a test tube.

Question

Betty made a simple electromagnet using just a battery and a wire. What could Betty do to increase the strength of her electromagnet?

    Coil the wire around a nail.
    Coil the wire around a toothbrush.
    Coil the wire around a paper towel roll.
    Coil the wire around a test tube.

brucebaner · Answer

@TheSmartOne

brucebaner · Answer

@ganeshie8

anonymous · Answer

coil the wire around the nail because giving the copper an iron core will increase the magnetic field :i took a electronics course in high school

anonymous · Answer

@vlax is right. Coil around the nail. Since nails are made out of metal, which conduct electricity much better than the test tube or paper, it wins.

Electricity and magnetism go hand in hand