The book A Systematic Treatise On Electrical Measurements was written by author Herschel Clifford Parker Here you can read free online of A Systematic Treatise On Electrical Measurements book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Systematic Treatise On Electrical Measurements a good or bad book?
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In the Multicellular Electrometer, Fig. 66, a number of movable vanes are employed turn- ing between corresponding fixed plates. The force of attraction is balanced by the torsion of the wire suspending the vanes. The scale is graduated directly to volts. The instrument is made in four different ranges, giving readings from 40 to 800 volts. It is possible with this form of electrometer to FlG 66 read as low as 15 volts. The ordinary Thomson Quadrant Electrometer may be used to measure an altern...ating E. M. F. If the vane and one pair of quadrants be joined to a terminal from the source of p. D. And the other terminal connected to the opposite pair of quadrants. The connections are then reversed by means of a commutator and the deflection observed. The E. M. F. 'S are then proportional to 2 A/deflections. This form of instrument is somewhat difficult to use and re- quires considerable care in the adjustments. A special form of electrometer in which the moving vane is rectangular in shape and suspended by a fine wire, is known as the "Low Reading Electrometer.
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