Galvanometers

A galvanometer is a sensitive device used to detect and measure small electric currents. It works by converting electrical energy into mechanical movement, typically causing a needle or pointer to shift on a scaled dial. When an electric current flows through its coil, it creates a magnetic field that interacts with a permanent magnet inside the device, causing the coil and needle to move proportionally to the current's strength. Galvanometers are essential in laboratories and in instruments for precisely measuring low currents, serving as fundamental components in many electrical measurement applications.