International Library of Technology · Scranton, International Textbook Co. · leaf 225
ter or mil-ammeter may be read toyoVo ampere and the voltmeter to TV volt. A variable resist-ance should also be inserted in series with the lamp so thatthe voltage across the lamp terminals may be kept nearlyconstant. Fig-. 18 shows the general scheme of connections. Theammeter A is connected in… … or^forage Bafferi/. Fig. 18. lamp. A. good ammeter and voltmeter are to be preferred toa wattmeter for this kind of work, as the results are morelikely to be accurate. Continuous current should, if possible,be used for all testing, as alternating-current instrumentsare more likely to lead to…
Electrical engineering
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