. The London, Edinburgh and Dublin philosophical magazine and journal of science. anymoment find the wattmeter constant. The method described above has this great advantage thatthe test can be made on fairly large samples of iron, and itcan be made with an alternating current having any desiredand practical form factor. The iron is tested under conditionswhich are exactly similar to those under which it will be usedin transformer manufacture, and, in fact, the straight mag-netizing coil and iron sample constitute an open circuittransformer of very small power factor. The above described method
. The London, Edinburgh and Dublin philosophical magazine and journal of science. anymoment find the wattmeter constant. The method described above has this great advantage thatthe test can be made on fairly large samples of iron, and itcan be made with an alternating current having any desiredand practical form factor. The iron is tested under conditionswhich are exactly similar to those under which it will be usedin transformer manufacture, and, in fact, the straight mag-netizing coil and iron sample constitute an open circuittransformer of very small power factor. The above described method effects a great saving of timein comparison with the ballistic method, whilst at the sametime it is an absolute method and does not depend upon com-parisons with other iron samples of supposed known hystereticvalue. 270 Prof. J. A. Fleming on a Method of determining g <D m m 23 hH += n^ .2 w 3 ^ (^ a> « <5 G G H a o «*H ^ O kO T3 M o „ -5 W) <u G G ° 5 _j .--i o o ^3 -t-i rG bC rt OQ s S.
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Keywords: ., bookcentury1800, bookdecade1840, bookidlondon, booksubjectscience
