"Electric
conductivity"*)
is the property of a
liquid, a solid (or a gas) to let electricity pass.
It
can be tested using a battery and a LED.
To
measure
electric conducticity you need a multimeter. Alternative
current should be used to prevent chemical reactions during the flow
of electricity.
*)
For measurements of electric conductivity in
labs special apparatus are needed.
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modification: 28.02.2006