Which tool can measure electrical potential between two points in a circuit?

The tool that measures electrical potential between two points in a circuit is the voltmeter. A voltmeter is specifically designed to measure voltage, which is the difference in electrical potential energy between two points. It is usually connected in parallel across the points where the voltage is to be measured, allowing it to accurately capture the potential difference.

In contrast, an ammeter is used to measure the current flowing through a circuit, not the potential difference. An ohmmeter measures the resistance of a component, which is related to the opposition to the flow of electric current, but it does not measure voltage. The statement that there are no tools for this purpose is inaccurate, as the voltmeter is a well-established instrument for measuring voltage in electrical circuits.