What is thermal conductivity?

Thermal conductivity is defined as the ability of a material to conduct heat. This property indicates how effectively heat energy can flow through a substance when there is a temperature difference across it. Materials with high thermal conductivity, such as metals, allow heat to pass through them easily, while materials with low thermal conductivity, like insulators, hinder heat flow.

Understanding thermal conductivity is crucial in various applications, including the design of thermal insulation, heat exchangers, and electronic devices where heat management is important. The correct option accurately reflects this fundamental concept in thermodynamics and material science.