What measurement is used to determine the conductivity of a circuit?

The measurement typically used to determine the conductivity of a circuit is resistance. Conductivity, in an electrical context, refers to how easily electric current can flow through a material or circuit. Resistance is the opposition that a material presents to the flow of electric current, and it is inversely related to conductivity. This means that as resistance decreases, conductivity increases, allowing for a better flow of electricity.

While continuity checks are important in identifying whether a circuit is complete or if there are breaks, they don't measure conductivity directly. Voltage refers to the electric potential difference; while it plays a role in the current flow, it does not directly indicate how well a circuit can conduct electricity. Current measures the flow of electric charge but, similar to voltage, does not provide a direct reading of a circuit’s conductivity.

In summary, resistance is the correct measurement for determining conductivity, as it quantifies how much a material resists the flow of electric current.