What is a Wheatstone bridge primarily used for?

The Wheatstone bridge is primarily used for measuring resistances. This instrument allows for the precise determination of an unknown resistance by comparing it with known resistances in a balanced circuit configuration. When the bridge is balanced, the ratio of the known resistances is equal to the ratio of the unknown resistance, providing an accurate way to quantify resistance values.

In practical applications, this capability is crucial for calibrating measuring instruments, testing components in electronics, and ensuring the accuracy of resistive elements within various circuits. The design of the Wheatstone bridge, which uses an electrical circuit with four resistors and a galvanometer, enables high sensitivity and precision in measurements, making it a staple in electrical engineering and experimental physics.

Understanding the function and setup of a Wheatstone bridge is vital for anyone working in fields that require accurate electrical measurements.