. The Encyclopædia britannica; a dictionary of arts, sciences, literature and general information. FiG. -Slider of Kelvin AmpereBalance. Fig. 7.—Lord Kelvins Ampere Balance. ing manner:—The upper edge of the shelf on which the weightsslide (see fig. 8) is graduated into equal divisions, and the weight is provided with a sharp ^ ^^ tongue of metal in order that its position on theshelf may be accuratelydetermined. Since the cur-rent passing through thebalance when equilibriumis obtained with a givenweight is proportional tothe square root of thecouple due to this weight,it follows that the
. The Encyclopædia britannica; a dictionary of arts, sciences, literature and general information. FiG. -Slider of Kelvin AmpereBalance. Fig. 7.—Lord Kelvins Ampere Balance. ing manner:—The upper edge of the shelf on which the weightsslide (see fig. 8) is graduated into equal divisions, and the weight is provided with a sharp ^ ^^ tongue of metal in order that its position on theshelf may be accuratelydetermined. Since the cur-rent passing through thebalance when equilibriumis obtained with a givenweight is proportional tothe square root of thecouple due to this weight,it follows that the currentstrength when equilibriumis obtained is proportionalto the product of the squareroot of the weight usedand the square root of thedisplacement distance of this weight from its zero position. Eachinstrument is accompanied by a pair of weights and by a squareroot table, so that the product of the square root of the numbercorresponding to the position of the sliding weight and theascertained constant for each weight, gives at once the value ofthe current in amperes. Each of these balanc
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
