Results 151 to 160 of about 14,082 (228)
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Electrical Engineering, 1934
A rectangular coordinate potentiometer circuit is described in this paper, the chief features of which are the elimination of the usual phase shifting transformer and the slide-wire type of potentiometer resistor. Although not yet available in commercial form this potentiometer has been in use in the laboratory for several years with good results ...
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A rectangular coordinate potentiometer circuit is described in this paper, the chief features of which are the elimination of the usual phase shifting transformer and the slide-wire type of potentiometer resistor. Although not yet available in commercial form this potentiometer has been in use in the laboratory for several years with good results ...
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Proceedings of the Indian Academy of Sciences - Section A, 1934
The usual thermionic valve circuits for amplifying the small measuring current in potentiometric methods cause serious errors due to the appreciable grid current present in valves having high mutual conductance. On the other hand, the use of electrometer valve is attended with lack of sensitiveness. A d.c.
D. N. Mehta, S. K. K. Jatkar
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The usual thermionic valve circuits for amplifying the small measuring current in potentiometric methods cause serious errors due to the appreciable grid current present in valves having high mutual conductance. On the other hand, the use of electrometer valve is attended with lack of sensitiveness. A d.c.
D. N. Mehta, S. K. K. Jatkar
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The Physics Teacher, 2005
The word potentiometer originally meant a device for measuring electric potential differences. Later, it also was applied to a tapped resistance used as a voltage divider. Although the measuring instrument is no longer used in undergraduate labs, it is the only truly perfect voltmeter, drawing no current and thus appearing to have an infinite impedance.
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The word potentiometer originally meant a device for measuring electric potential differences. Later, it also was applied to a tapped resistance used as a voltage divider. Although the measuring instrument is no longer used in undergraduate labs, it is the only truly perfect voltmeter, drawing no current and thus appearing to have an infinite impedance.
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Journal of Scientific Instruments, 1933
The instrument described is intended to combine sensitivity with a large range of temperature for thermocouple measurements. The principle of the method is to oppose the E.M.F of the couple by one nearly equal, thus enabling a millivoltmeter to be read directly in ranges of 100° C. between - 100° C. and + 1200° C.
A Egerton, A R Ubbelohde
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The instrument described is intended to combine sensitivity with a large range of temperature for thermocouple measurements. The principle of the method is to oppose the E.M.F of the couple by one nearly equal, thus enabling a millivoltmeter to be read directly in ranges of 100° C. between - 100° C. and + 1200° C.
A Egerton, A R Ubbelohde
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The High-Voltage Potentiometer
Transactions of the American Institute of Electrical Engineers, 1916The author describes a high-voltage potentiometer which may be made at reasonable expense consisting of a water resistance potential distributor and a sparking probe potential difference detector. The water resistance consists of a column of water moving slowly through an ample length of garden hose, and tapping in points through which to connect the ...
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Physics Today, 1966
Physicists who work on superfluidity have often “lost their cool” arguing over the meaning or even the existence of certain new effects. Controversy arose because measurements were frequently rough and inconclusive. Now a simple but powerful new technique for studying processes that affect superfluid film flow has been developed, which uses level ...
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Physicists who work on superfluidity have often “lost their cool” arguing over the meaning or even the existence of certain new effects. Controversy arose because measurements were frequently rough and inconclusive. Now a simple but powerful new technique for studying processes that affect superfluid film flow has been developed, which uses level ...
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Transactions of the American Institute of Electrical Engineers, 1931
This paper discusses potentiometer design under the following headings: I. Early history. II. Factors affecting voltage range. III. Factore affecting potentiometer resistance. IV. Low-voltage potentiometers. V. Analysis of potentiometer errors. VI. Self-checking features of potentiometers. VII. Galvanometer considerations. VIII. Comments on volt-boxes.
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This paper discusses potentiometer design under the following headings: I. Early history. II. Factors affecting voltage range. III. Factore affecting potentiometer resistance. IV. Low-voltage potentiometers. V. Analysis of potentiometer errors. VI. Self-checking features of potentiometers. VII. Galvanometer considerations. VIII. Comments on volt-boxes.
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SSSA Book Series, 1996
Soil pH is probably the single most informative measurement that can be made to determine soil characteristics. At a single glance, pH tells much more about a soil than merely indicating whether it is acidic or basic.
G. W. Thomas
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Soil pH is probably the single most informative measurement that can be made to determine soil characteristics. At a single glance, pH tells much more about a soil than merely indicating whether it is acidic or basic.
G. W. Thomas
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