Physics
Physics, 03.12.2019 21:31, rayden62

An electromagnet is created using a battery, an insulated copper wire, and an iron nail. the wire is wrapped around the nail 20 times and attached to the battery. which pair of changes will definitely increase the strength of the electromagnet?

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An electromagnet is created using a battery, an insulated copper wire, and an iron nail. the wire is...

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