Question: A solid copper wire 1 mm in diameter carries 1 0 A of current. ( a ) What is the current density J ? [

A solid copper wire 1 mm in diameter carries 10 A of current. (a) What is the current density J?[A/m2](b) Assuming each copper atom contributes one conduction electron, what is the average drift velocity of the electrons? [m/s]

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