Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 377
Fig. 49. Standard Plug-Type Resistance Box and Whcatitonc BridgeCourtesy of Leeds and Northrup Company, Philadelphia shown in Fig. 49. The principle of this instrument is the same asdescribed for Fig. 47, the only difference being that the value of theresistance in arm P is varied in order to find… … Fig. 50. Diagram Showing Method of Making Bridge Measurements tion, instead of moving the tap for the galvanometer along the wire.This variable arm consists of a number of resistance coils of differentvalues connected in series, as already shown in Fig. 45. The method of using the bridge will be…
Electrical engineering
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