Current Density DefinitionCurrent density is defined as the electric current per unit area of a conductor’s cross-section, denoted by J.Formula for Current DensityThe current density in a metal is calculated using J = I/A, where I is the current and A is the cross-sectional area.Semiconductor Current FlowIn semiconductors, current density is due to both electrons and holes, which move in opposite directions but contribute to the same direction of current.Current Density in MetalImagine a conduct