Application
DC Null Detection: Galvanometers are used to detect null points in electrical circuits, particularly in Wheatstone bridges and potentiometers. They indicate when the circuit is balanced, meaning that there is no current flowing through the galvanometer, and thus provide a precise measurement of resistance or voltage.
Light Source:
6 Volt, 0.3 Amp Bulb: The galvanometer is equipped with a light source, typically a bulb, powered by a 6-volt power supply with a current rating of 0.3 amperes. This light source serves to illuminate a scale for easy reading of measurements.