Question

the device which can detect current at very low voltages in an electric circuit is called what​

Answer 1

Answer:galvanometer

Explanation:

A galvanometer is an electromechanical instrument used for detecting and indicating an electric current. A galvanometer works as an actuator, by producing a rotary deflection (of a "pointer"), in response to electric current flowing through a coil in a constant magnetic field

Answer 2

The device that can be used to detect very small current in an circuit is MCB (Miniature Circuit Breaker).