What is the typical function of a voltmeter?

The typical function of a voltmeter is to measure electromotive force, which refers to the voltage available in a circuit. It quantifies the potential difference between two points in an electrical circuit, allowing technicians to assess the voltage being supplied or dropping across components. This measurement is crucial for diagnosing electrical issues in residential air conditioning systems, ensuring that the system operates effectively and safely.

In contrast, measuring current is the primary function of an ammeter, while a multimeter can measure resistance, typically expressed in ohms. The function of measuring frequency, on the other hand, is relevant in specific scenarios but is not what a voltmeter is designed for. Understanding the role of a voltmeter is vital for any technician, as it provides essential information regarding the electrical system's health and performance.