In relation to resistance, what does conductance measure?

Conductance measures the ease with which electric current can flow through a material. It is the reciprocal of resistance, which means that a higher conductance indicates that current can flow more freely. This concept is particularly important in understanding how materials behave in electrical circuits; materials with high conductance are often used in applications where efficient current flow is critical.

When conductance is high, it implies low resistance, meaning that less energy is lost as heat due to the current flowing through the conductor. This ability to facilitate current flow is a fundamental characteristic of conductive materials, especially metals, which have high levels of conductance compared to insulators.

The other options address different characteristics of materials, such as strength, physical size, and volume. These attributes do not directly relate to the concept of how easily current can travel through a substance, and thus, they do not define conductance.