The device used for measuring electric current in a circuit is called

An ammeter is the primary instrument used to measure the strength of electric current flowing through a circuit. The name is derived from 'ampere', the SI unit of electric current. To accurately measure current, the ammeter must be connected in series within the circuit so that the entire current flows through it. In contrast, a voltmeter is used to measure the potential difference (voltage) between two points and is connected in parallel. Other devices mentioned, such as motors and generators, are not measuring instruments; a motor converts electrical energy into mechanical energy, while a generator converts mechanical energy into electrical energy. Ammeters can be analog, utilizing a galvanometer with a needle deflection, or digital.