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Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets (1907)

Schneider, Norman H. (Norman Hugh), Hargrave, Jesse · New York, Spon & Chamberlain; [etc., etc.] · leaf 222

An illustration from Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets, 1907, leaf 222
insure a proper battery strength. If dynamocurrent be used, a reducing rheostat should invari-ably be placed in circuit and sufficient resistanceshould be cut in as to obviate any danger of over-heating the coils of the bridge. It is sometimes TESTING TELEGRAPH WIRES AND CABLES. 199 advisable to… … Fig. 111.

Electric testing · Electric apparatus and appliances

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