The Moving Coil Galvanometer as a Circuit Element
N F Astbury · Proceedings of the Physical Society · 1948
An account is given of a simplified calculus applicable to a moving-coil galvanometer in which use is made of the concept of motional impedance. The fundamental galvanometer equations are presented in a novel and very simple form. Examples of the use of the formulae are given, notably with reference to the ultimate "noise level" of a galvanometer.