Where should supply voltage be typically measured in a circuit?

The typical measurement of supply voltage in a circuit is often done between two specified points, such as points A and B. This approach allows for precise evaluation of the voltage drop across components or connections within the circuit, helping to identify issues such as resistance or losses that may occur along the path of current flow. By measuring between two specific points, it provides a clear understanding of how voltage is distributed across the circuit and ensures accurate diagnostic readings that contribute to effective troubleshooting and analysis.

Measuring voltage between defined points allows for a comprehensive assessment of circuit performance. It is a fundamental practice in electrical and automation engineering, as it enables technicians to pinpoint specific segments of the circuit that may not be functioning properly. This method contrasts with measuring only between the power source and ground or at specific setup points, which can overlook important voltage variations that occur across different circuit components.