what does galvanometer measure

A galvanometer is an instrument used to measure electrical current. It works based on the magnetic force that causes a needle to turn, and its movement is directly proportional to the intensity of the electric current in the circuit. The device is used to measure the intensity and direction of electrical current in electrical circuits. Galvanometers can be used to prevent devices from experiencing electrical overload by measuring the intensity of an electrical current and monitoring it. There are simple galvanometers and those with a larger measurement scale, as well as more complexity, which enable measurement in industrial atmospheres. The most common type of galvanometer is the D’Arsonval galvanometer, which consists of a light coil of wire suspended from a metallic ribbon between the poles of a permanent magnet. The magnetic field produced by a current passing through the coil reacts with the magnetic field of the permanent magnet, producing a torque, or twisting force, which causes the coil to rotate under the action of the torque. The angle through which it rotates to balance the torsion of the suspension provides a measure of the current flowing in the coil. The angle is measured by the movement of the needle or by the deflection of a beam of light reflected from the mirror.