Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 98
e. The case of theinstrument is usually circular, and the position of the balanceball can be observed by the aid of a graduated circle engravedon the case. A second small ball F carried on an insulatedstem can be introduced through a hole in the case and broughtinto any desired position near A. 88… … Fig. 51. is resisted by its elasticity, and A comes to rest in a positionin which the electrical force of repulsion is equal to the forcearising from the twist of the wire. But this latter force isknown to be proportional to the angle through which the wireis twisted, and this latter angle is given…
Electricity · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
