Resistance of composite material

[Another]

Composite materials consist of various components such as moist wood ,how will the internal resistance of this material behave?
If I want to study the resistance of composite materials, which topic should I study?

 

[trurle]

Summary: In a composite material consisting of many components, how will the internal resistance of this material behave?

Composite materials consist of various components such as moist wood ,how will the internal resistance of this material behave?
If I want to study the resistance of composite materials, which topic should I study?

Generally, composites act as varistors - i.e. their resistance reduces as voltage increases. This is generic effect arising from many small (insulating) gaps found in most composites.