What instrument is used to indicate small values of electric current?

The instrument used to indicate small values of electric current is the galvanometer. This device is specifically designed to detect and measure the small currents that may not be accurately captured by larger instruments like ammeters. Galvanometers operate based on the principle that an electric current creates a magnetic field, which in turn causes a movement in a needle or pointer that provides a visual indication of the current's presence and magnitude.

While a multimeter can also measure current, it is generally used for a wider range of applications and may not provide the sensitivity needed for very small currents. An ammeter is more suited for measuring larger currents, and a voltmeter measures voltage rather than current. Therefore, the galvanometer triumphed in being the correct choice for indicating small values of electric current.