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

options:

Coil the wire around a test tube.

Coil the wire around a toothbrush

Coil the wire around a paper towel roll.

Coil the wire around a nail.

Respuesta :

Answer:
Coil the wire around a nail

Explanation:
Nail is a metal which can conduct electric

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