How does a digital multimeter measure voltage?

A digital multimeter measures voltage by connecting the leads in parallel with the circuit or component being tested. This setup allows the multimeter to measure the potential difference across the two points in the circuit. When leads are connected in parallel, the multimeter essentially becomes part of the circuit, allowing it to accurately capture the voltage that exists between the test points without disrupting the flow of current in the circuit itself.

This method is fundamental to voltage measurement because it provides a direct reading of the electrical potential without affecting the circuit's operation. It's also important to note that connecting leads in series, as suggested in another option, would be inappropriate for measuring voltage, as it would disrupt the circuit and potentially lead to incorrect readings or damage the multimeter or components.