<Table> <Tr> <Td> Part of a series of articles about </Td> </Tr> <Tr> <Th> Electromagnetism </Th> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> <Ul> <Li> Electricity </Li> <Li> Magnetism </Li> </Ul> </Td> </Tr> <Tr> <Td> Electrostatics (hide) <Ul> <Li> Electric charge </Li> <Li> Static electricity </Li> <Li> Electric field </Li> <Li> Conductor </Li> <Li> Insulator </Li> <Li> Triboelectricity </Li> <Li> Electrostatic discharge </Li> <Li> Induction </Li> <Li> Coulomb's law </Li> <Li> Gauss's law </Li> <Li> Electric flux / potential energy </Li> <Li> Electric dipole moment </Li> <Li> Polarization density </Li> </Ul> </Td> </Tr> <Tr> <Td> Magnetostatics (show) <Ul> <Li> Ampère's law </Li> <Li> Magnetic field </Li> <Li> Magnetization </Li> <Li> Magnetic flux </Li> <Li> Biot--Savart law </Li> <Li> Magnetic dipole moment </Li> <Li> Gauss's law for magnetism </Li> </Ul> </Td> </Tr> <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> <Tr> <Td> Electrical network (show) <Ul> <Li> Electric current </Li> <Li> Electric potential </Li> <Li> Voltage </Li> <Li> Resistance </Li> <Li> Ohm's law </Li> <Li> Series circuit </Li> <Li> Parallel circuit </Li> <Li> Direct current </Li> <Li> Alternating current </Li> <Li> Electromotive force </Li> <Li> Capacitance </Li> <Li> Inductance </Li> <Li> Impedance </Li> <Li> Resonant cavities </Li> <Li> Waveguides </Li> </Ul> </Td> </Tr> <Tr> <Td> Covariant formulation (show) <Ul> <Li> Electromagnetic tensor (stress--energy tensor) </Li> </Ul> <Ul> <Li> Four - current </Li> <Li> Electromagnetic four - potential </Li> </Ul> </Td> </Tr> <Tr> <Td> Scientists (show) <Ul> <Li> Ampère </Li> <Li> Coulomb </Li> <Li> Faraday </Li> <Li> Gauss </Li> <Li> Heaviside </Li> <Li> Henry </Li> <Li> Hertz </Li> <Li> Lorentz </Li> <Li> Maxwell </Li> <Li> Tesla </Li> <Li> Volta </Li> <Li> Weber </Li> <Li> Ørsted </Li> <Li> </Li> </Ul> </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table> <Tr> <Td> Part of a series of articles about </Td> </Tr>

In order for a substance to be an electrical conductor what general property must it possess