strømtæthedens
Strømtæthedens, often translated as current density, is a fundamental concept in electromagnetism that describes the rate at which electric charge flows through a unit area. It is a vector quantity, meaning it has both magnitude and direction. The direction of the current density vector is the same as the direction of the flow of positive charge. Mathematically, current density is represented by the symbol J.
The magnitude of current density is defined as the electric current I passing through a surface perpendicular
Understanding current density is crucial for analyzing electrical circuits and phenomena. For example, in conductors, current