What is the magnitude of the flow speed of the charge carriers (mm/s)?  Diameter=1.5 mm I=2.01 A There are 8.5×1028 free electrons in copper per cubic meter and cross-sectional area is 1.767μm2

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.