can you give a definition of electrical conductive?

Answer 1

'Conductive', in the electrical sense, describes the property of a material which enables an electric current to pass through that material. An electric current is a drift of charge carriers -in the case of a metal, these charge carriers are negatively-charged free electrons, but in other materials, such as electrolytes (conducting fluids) the charge carriers may be charged atoms, called ions.

For a material to act as a conductor, it needs to have sufficient charge carriers to support current flow; if there are too few, then we say the material is an insulator. There is no such thing as a 'perfect' conductor or a 'perfect' insulator, but we can list different materials on a scale where one end represents an excellent conductor (or a very poor insulator) and the opposite end represents an excellent insulator (or a very poor conductor).

The property used to define whether a particular material is classified as a conductor or an insulator is termed its 'resistivity', expressed in ohm metres.