The current density in a cylindrical wire of radius R is given by J = Jo(1-). Density is parallel to the axis. Find the total current passing through the section perpendicular to the axis. a) I = "J,R2 b) I = -4nJ,R? c) I = -n],R² d) I = -112nJR² 63 2 575 e) I = - R?

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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.