A 100-m-long copper wire of radius 0.24 mmmm and mass 160 g is connected across a 1.5-V battery. The resistivity of copper is 1.7×10−81.7×10−8Ω⋅m. A. Determine the resistance of the wire. B. Determine the current through the wire. C. Determine the power delivered by the battery.

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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.