An aluminum wire of radius 1.00 mm carries a current of 1.00 mA. The density of aluminum is 2.70x103kg/m3, and 1 mole of aluminum has a mass of 26.98g. There is one conduction electron per aluminum atom. a. The current density in the wire is:___  A/m2 b. The drift velocity of the electrons carrying this current is:___ x10-8m/s c. The distance traveled by an electron in 10 hours is:___mm.

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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.