# Thermoelectric Sentence Examples

- The hot junction is raised to 270 C., at which temperature the
**thermoelectric**power vanishes and the metals are said to be neutral to one another. - In 1873 he took
**thermoelectricity**for the subject of his discourse as Rede lecturer at Cambridge, and in the same year he presented the first sketch of his well-known**thermoelectric**diagram before the Royal Society of Edinburgh. - Cumming shortly afterwards discovered the phenomenon of
**Thermoelectric**Inversion, or the change of the order of the metals in the**thermoelectric**series at different temperatures. - Similar phenomena occur in the case of many other couples, and it is found that the
**thermoelectric**power p is not in general a constant, and that the simple linear formula (I) is applicable only for small differences of temperature. - A
**thermoelectric**circuit may be cut at any point and a wire of some other metal introduced without altering the E.M.F. - For high temperature work it is necessary to employ platinum, which would be an ideal standard for all purposes on account of its constancy and infusibility, did not the
**thermoelectric**properties of different specimens differ considerably. - We have also the relations dE/dt = b+2ct and d 2 E/dt 2 =2C. The first relation gives the
**thermoelectric**power p at any temperature, and is probably the most convenient method of stating results in all cases in which this formula is applicable. - Unlike the frictional generation of heat due to the resistance of the conductor, which Joule (1841) Table I.-
**Thermoelectric**Power, p=dE/dt, IN Microvolts At 50° C. Of Pure Metals With Respect To Lead. - The value of the
**thermoelectric**power dE/dt at 50° C. is taken as the mean value between o° and 100° C., over which range it can be most accurately determined. - Becquerel that the intensity of the effect depended on the
**thermoelectric**power of the junction and was independent of its form or dimensions. - Edin., 1851) that this conclusion was inconsistent with the known facts of
**thermoelectric**inversion. - (2) If the Peltier effect was proportional to the
**thermoelectric**power and changed sign with it, as all experiments appeared to indicate, there would A B be no absorption of heat C in the circuit due to the Peltier effect, and therefore no thermal source to account for the energy of the current, in the case in which the hot junction was at or above the neutral temperature. - The balance is adjusted by shunting either AD or BD with a box, S, containing 20 to Ioo ohms. All the wires in the quadrilateral must be of the same metal as AB, to avoid accidental
**thermoelectric**effects which would obscure the result. - Mag., December 1852), to make experiments to verify quantitatively the relation P/T =dE/dT between the Peltier effect and the
**thermoelectric**power. - Subsequent experiments led him to doubt this conclusion as regards conductivity, but his
**thermoelectric**experiments (Proc. R. - In accordance with this hypothesis, the curves representing the variations of
**thermoelectric**power, dE/dt, with temperature 'OObservationsof' Pia. - P. 201, 1867) made a number of relative measurements of the effect in different metals, which agreed qualitatively with observations of the
**thermoelectric**power, and showed that the effect was proportional to the current for a given temperature gradient. - The general results of the work appeared to support Tait's hypothesis that the effect was proportional to the absolute temperature, but direct
**thermoelectric**tests do not appear to have been made on the specimens employed, which would have afforded a valuable confirmation by the comparison of the values of d 2 E/dT 2, as in Jahn's experiments. - The value found at a temperature of 150° C. was +2.5 microjoules per ampere-second per degree, or +2.5 microvolts per degree in the case of copper, which agrees very fairly with the value deduced from
**thermoelectric**tests. - - It is instructive to consider the distribution of potential in a
**thermoelectric**circuit, and its relation to the resultant E.M.F. - - It is now generally conceded that the relatively large differences of potential observable with an electrometer between metals on open circuit, as discovered by Volta, are due to the chemical affinities of the metals, and have no direct relation to
**thermoelectric**phenomena or to the Peltier effect. - DE, namely, dE =dP+(s' - s")dT = (P/T)dT = pdT = (p" - p')dT, in which the coefficient, P, of the Peltier effect, and the
**thermoelectric**power, p, of the couple, may be expressed in terms of the difference of the**thermoelectric**powers, p and p", of the separate metals with respect to a neutral standard. - The line of lead is taken to be horizontal in the diagram, because the
**thermoelectric**power, p, may be reckoned from any convenient zero. - The "
**thermoelectric**constant," 0, of Kohlrausch, is evidently the same as the**thermoelectric**power, p, in Thomson's theory. - It is difficult to see how this complication can be avoided, unless the first postulate is abandoned, and the heat-flow due to conduction is assumed to be independent of the
**thermoelectric**phenomena. - 96, p. 1258) gives a theoretical discussion of all possible forms of expression for
**thermoelectric**phenomena. **Thermoelectric**Relations.- P = dE/dt =
**Thermoelectric**Power. - If then oscillations are sent through the other pair heat is produced at the junction and the galvanometer indicates a
**thermoelectric**current (Wied. - This
**thermoelectric**receiver was made vastly more sensitive by W. - Miscellaneous Effects of Magnetization: Electric Conductivity - Hall Effect - Electro-Thermal Relations -
**Thermoelectric**Quality - Elasticity - Chemical and Voltaic Effects. - Its electrical conductivity is approximately 1.2, silver at 0° being taken as 100; it is the most diamagnetic substance known, and its
**thermoelectric**properties render it especially valuable for the construction of thermopiles. **Thermoelectric**Power, Series, Inversion.- - The limiting value, dE/dt, of the coefficient, p, for an infinitesimal difference, dt, between the junctions is called the
**Thermoelectric**Power of the couple. - Seebeck found that the metals could be arranged in a
**Thermoelectric**Series, in the order of their power when combined with any one metal, such that the power of any thermocouple p, composed of the metals A and B, was equal to the algebraic difference (p'-p") of their powers when combined with the standard metal C. The order of the metals in this series was found to be different from that in the corresponding Volta series, and to be considerably affected by variations in purity, hardness and other physical conditions. - Cumming shortly afterwards discovered the phenomenon of
**Thermoelectric**Inversion, or the change of the order of the metals in the**thermoelectric**series at different temperatures. - (2) where p', p, &c., are the
**thermoelectric**powers of the metals, and to, t', t", &c., the temperatures of the junctions. - But on account of the difficulty of the measurements involved, the verification of the accurate relation between the Peltier effect and
**thermoelectric**power was left to more recent times. - The order of the metals in respect of the Peltier effect was found to be the same as the
**thermoelectric**series.