What is the purpose of a potentiometer?

The purpose of a potentiometer is to measure electric potential (voltage). It is an essential tool in electrical circuits that allows for the precise measurement of voltage differences between two points. This is typically achieved by using a three-terminal resistive device that can divide voltage proportionally.

When a potentiometer is connected to a circuit, it can be adjusted to provide a variable output voltage corresponding to the input voltage applied. This characteristic makes it invaluable in applications such as calibrating voltage levels and measuring potential differences across components, ensuring accurate and reliable readings necessary for proper circuit analysis and troubleshooting.

While measuring electrical resistance, controlling current flow, or testing circuits for shorts are essential functions in electrical engineering, they are not the primary purposes of a potentiometer. Instead, the focus lies on voltage measurement, which is critical for many electronics and control systems.