MathLiveOhm's law in microscopic form
This gives the current density in a material as the electrical conductivity times the local electric field. It is used to describe how current flows through a conducting medium at each point, rather than through a whole circuit element.
\mathbf{J} = \sigma \mathbf{E}What the symbols mean
| electric current density (amperes per square metre) | |
| electrical conductivity (siemens per metre) | |
| electric field strength (volts per metre) |
About this formula
- FieldPhysics
- TopicElectromagnetism
- LevelUniversity
- Also calledcurrent density equals conductivity times electric field, electrical conductivity formula, conductivity equation, microscopic Ohm's law, current density electric field relation, local form of Ohm's law
- SourceWikidata Q4593291
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