Question: A copper wire has a square cross section 3 . 0 mmmm on a side. The wire is 4 . 3 mm long and carries

A copper wire has a square cross section 3.0 mmmm on a side. The wire is 4.3 mm long and carries a current of 4.0 AA. The density of free electrons is 8.51028m38.51028m3.

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