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

A voltmeter is specifically designed to measure the electrical potential difference, or voltage, between two points in a circuit. This instrument allows users to understand how much potential energy exists per unit charge in the electrical system, which is critical for diagnosing circuit behavior and ensuring proper function. By connecting the voltmeter in parallel to the components of the circuit where you want to measure voltage, it provides a direct readout of the potential difference, helping to assess whether components are operating within their required voltage range.

Other tools serve different purposes; an ohmmeter measures resistance, while an ammeter measures current. Both are essential for different analyses in electrical circuits, but they do not provide information about voltage potential on their own. The statement that there are no tools for this purpose is incorrect, as the voltmeter fulfills this specific role effectively.