International Library of Technology · Scranton, International Textbook Co. · leaf 229
galvanometershould be so placedwithin the coil that thescales are one on eachside of the circle. Whenthe whole instrument fig. 1017. is then turned so that the glass pointer is at right angles tothe coil and over the zero marks, the axis of the magnetizedneedle will be in the plane of the coil.… … 1664 ELECTRICAL MEASUREMENTS. introducing a thin knife-blade or a toothpick under the edgeof the glass. The cotton which is placed on the glasspointer to protect it while in transit must then be carefully-removed, after which the glass should be replaced and thering sprung in. The apparatus is then…
Electrical engineering
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