Correct Answer:
Option D - A galvanometer is an electromechanical instrument used for detecting and indicating an electric current on a circuit. A galvanometer works as an actuator, by producing a rotary deflection, in response to electric current flowing through a coil in a constant magnetic field.
D. A galvanometer is an electromechanical instrument used for detecting and indicating an electric current on a circuit. A galvanometer works as an actuator, by producing a rotary deflection, in response to electric current flowing through a coil in a constant magnetic field.