galvanometer

A galvanometer is a sensitive instrument used to detect and measure small electric currents. It operates based on the principle that when an electric current flows through a coil of wire within a magnetic field, it experiences a force causing a needle or pointer to move. The amount of needle movement indicates the magnitude of the current. Galvanometers are commonly used in laboratories for precise measurements, in circuits to detect current flow, and as components in devices like meters and sensors. They are valuable tools for understanding and analyzing electrical phenomena accurately.