<Li> Gauss's law for magnetism </Li> <Tr> <Td> Electrodynamics (show) <Ul> <Li> Lorentz force law </Li> <Li> Electromagnetic induction </Li> <Li> Faraday's law </Li> <Li> Lenz's law </Li> <Li> Displacement current </Li> <Li> Magnetic potential </Li> <Li> Maxwell's equations </Li> <Li> Electromagnetic field </Li> <Li> Electromagnetic pulse </Li> <Li> Electromagnetic radiation </Li> <Li> Maxwell tensor </Li> <Li> Poynting vector </Li> <Li> Liénard--Wiechert potential </Li> <Li> Jefimenko's equations </Li> <Li> Eddy current </Li> <Li> London equations </Li> </Ul> <Ul> <Li> Mathematical descriptions of the electromagnetic field </Li> </Ul> </Td> </Tr> <Ul> <Li> Lorentz force law </Li> <Li> Electromagnetic induction </Li> <Li> Faraday's law </Li> <Li> Lenz's law </Li> <Li> Displacement current </Li> <Li> Magnetic potential </Li> <Li> Maxwell's equations </Li> <Li> Electromagnetic field </Li> <Li> Electromagnetic pulse </Li> <Li> Electromagnetic radiation </Li> <Li> Maxwell tensor </Li> <Li> Poynting vector </Li> <Li> Liénard--Wiechert potential </Li> <Li> Jefimenko's equations </Li> <Li> Eddy current </Li> <Li> London equations </Li> </Ul> <Li> Lorentz force law </Li>

What is the mathematical expression of ohm's law