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OpenStudy (anonymous):

Magnetism Problem

OpenStudy (anonymous):

The problem is: find the current needed to lift a Cu (density= 8.3 g/cm^3) wire w/ diameter=1mm and r=10cm. We just learned magnetism so I'm assuming that we need to use it to solve the problem. I don't know what to do though. Attached is what I have done, it seems right but the current is so high that I doubt it's right...

OpenStudy (vincent-lyon.fr):

Where is the drawing? How does the current flow?

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