Notes on electricity and magnetism. designed as a companion to Silvanus P. Thompson's Elementary lessons (1891)
Murdock, J. B. (Joseph Ballard), 1851-1931, Thomson, Silvanus Phillips, 1851-1916 · New York, Macmillan & Co. · leaf 18
to the readings if the deflections are small. 4. Differential Galvanometer (§ 203).The differential galvanometer is used not to measure ELECTRICITY AND MAGNETISM. currents, but to indicate that two are either equal or un-equal. As the greater the resistance a current has toflow through, the smaller… … Fig. 2. In the figure it is seen that if the key is depressed to makecontact with EE, the currents pass around the needle inopposite directions. In the figure one current is fartherfrom the needle than the other, but great care is taken inmaking the instrument to have the coils similarly placedand…
Electricity · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
