A current of 1.0 A exists in a copper wire of cross-section

Question:

A current of $1.0$ A exists in a copper wire of cross-section $1.0 \mathrm{~mm}^{2}$. Assuming one free electron per atom calculate the drift speed of the free electrons in the wire. The density of copper is $9000 \mathrm{~kg} / \mathrm{m}^{3}$.

Solution:

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