Question

Your class is designing electromagnets. Available materials include: various batteries, different sizes of iron nails, and a large roll of copper wire. Your group built an electromagnet and collected the following results. What can you infer from their results?

(1 point)

20 coils is 4 times stronger than 5 coils.

Increasing the coils of wire increased the strength of the magnet.

Increasing the coils of wire decreased the strength of the magnet.

For every 5 coils of wire added to the electromagnet, the strength of the magnet doubled.
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Answer 1

Increasing the coils of wire increased the strength of the magnet.

Reason: their data show strength rises as the number of turns increases. The other specific claims (20 coils = 4× of 5 coils or “every 5 coils doubles strength”) assume particular quantitative relationships that aren’t necessarily supported without more data.