A student is testing the strength of his electromagnet after changing the number of coils of wire around its core. He uses the electromagnet to pick up paperclips. Why should he use only one size of paperclip? (1 point)

Question

Responses

so that the experiment can be reproduced
so that the experiment can be reproduced

because it will be easier to count the paperclips
because it will be easier to count the paperclips

because the electromagnet will be able to pick up more paperclips
because the electromagnet will be able to pick up more paperclips

so there is only one variable, the number of coils of wire
so there is only one variable, the number of coils of wire
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Answer 1

because there is only one variable, the number of coils of wire. If different sizes of paperclips are used, it could introduce additional variables that could affect the results of the experiment. By using only one size of paperclip, the student can accurately measure and compare the strength of the electromagnet based on the number of coils of wire.