The potential difference between points in a wire 75.0 cm apart is 0.938 V when the current density is 4.40 x 107 A/m2. What is a) the magnitude of Electric field E in the wire? b) the resistivity of the material of which the wire made

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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.