conductivity is a kind of physical property
sensitivity is physical_property. reluctivity is physical_property. electrical_conductivity_material_topic is material_topic. conduction is not physical_phenomenon. electrical_conductivity_material_topic is not material_topic. conduction is physical_phenomenon. invisibility is physical_property. thermal_conductivity is tangible_physical_quantity. reluctivity is not physical_property. invisibility is not physical_property.