Doubting Dennis doesn’t believe in electromagnetism so he makes an electromagnetic to prove his teacher wrong. To his surprise, the electromagnetic works and he’s able to pick up metal objects with it. Even still, he’s still not satisfied with his electromagnetic because it’s very weak. What can he do to make it stronger? Drag the best answer into the white box.

Question

(Picture of a big battery, using copper wire and wrapping around a long metal nail)

Use a stronger battery
Use a plastic nail
Glue the wire to the nail
Use a weaker battery
Wrap the wire around the nail less times

Answer 1

Use a stronger battery