Physics
Physics, 29.09.2019 16:30, WendigoMeow

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

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