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Sometimes, electric current flows through very thin metal films or layers with variable thickness. In such cases, the researchers are interested in the width rather than in the total cross-section of such thin conductors and they measure linear current density, which is a vector value ...
section of such thin conductors and they measure linear current density, which is a vector value that is equal to the limit of the product of the density of the current flowing through a thin surface layer of the conductor and the thickness of this layer when the latter appr...