EVERYDAY SCIENCE

Detailed explanation-1: -The earliest form of the electromagnetic galvanometer was devised in 1820 by Johann Schweigger (1779–1857) at the University of Halle in Germany.

Detailed explanation-2: -That same year, German chemist Johann Schweigger described the possibility of using an instrument capable of measuring such a phenomenon. However, it was not until 1836 that the galvanometer was formally invented by Italian scientist Luigi Galvani.

Detailed explanation-3: -The galvanometer, first invented in 1802, was a means of detecting electric current. It consisted of a needle that was deflected by the magnetic field that electric current created; a stronger current produced a larger deflection.

Detailed explanation-4: -The former galvanometer was introduced by Johann Schweigger in the year 1820. The development of the device was also done by Andre Marie Ampere. The former designs enhanced the effect of the magnetic field that was developed by the current through many numbers of wire turns.

Detailed explanation-5: -The level of movement of the moving coil galvanometer is reflective of the strength of the electrical current. Hans Christian Oersted created the moving coil galvanometer in 1820.