Electrical conductivity is an example of a physical property of a substance. Electrical conductivity is a material's ability to conduct electricity.
A physical property is one that can be measured or observed without changing the composition or identity of the substance. Physical properties can be used to describe matter. Other examples of such include:
1. Color - hue of an object as perceived by humans.
2. Density - Mass per unit volume of a substance.
3. Melting point - temperature where a solid changes to liquid.