Electrical installations of electric light, power, traction and industrial electrical machinery (1902)
Kennedy, Rankin, d. 1917 · Edinburgh T.C. & E.C. Jack · leaf 46
st observed by sliding the wirealonof until the needle isat zero, and then, bytapping the wires to-gether, noting whetherthe needle moves to oneside or other ; if it movesto one side or other, tapit a little further alonguntil a spot is touchedwhere the needle doesnot move: the doublescale can then… … Fig. 31.—Section of Scale of Metre Bridge Resistance Coils required. The pressure gauge is used as a galvanometer when theneedle is in or near centre of the coil, and is to be used with thisbridge for measurements. A standard i ohm resistance will be required. This can bebought for three or four…
Electrical engineering · Electric power
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