Resistance of wires

Filled-bulb temperature sensors are also widely used. An inert gas is enclosed in a constant-volume system. Changes in process temperature cause the pressure exerted by the gas to change. Resistance thermometers arc used where accurate temperature or diflcrcntial-temperature measurement is required. They use the principle that the electrical resistance of wire changes with temperature. 

The wires were the same as with the Dortmund-Duisburg system except that insulation was not removed, since it was essential in this system id keep the resistance of wires constant Note In all wire control systems, the fall of wire to the earth proved to be a nuisance and a hazard... 

Radiative Transition Probabilities for X-Ray Lines Radioactive Tracer Diffusion Data for Pure Metals Recommended Daily Dietary Allowances Reduction of Barometer to Sea Level Refractory Materials Resistance of Wires Resistivity of Semiconducting Minerals Solvents for Liquid Chromatography Spark-Gap Voltages... 

The ohmic resistance (/ ohm) function of contact pressure cycling is shown in Fig. 17.19 for Dapozol -G55 and Celtec PllOOW MEAs. The values have been extracted from the Nyquist plots at 0.3 A/cm shown in [21]. As previously defined, ohmic or high frequency resistances are used to differentiate the resistance of conduction of protons and electrons and resistances of wires and MEA contact interfaces as BBP/GDL and GDL/CL. If one assumes a constant or nearly constant contribution from proton conductivity resistance through the membrane as the membrane thickness is nearly constant in comparison with GDL thickness changes with increasing the contact pressure [17] and resistance related to fuel cell wires and connections is constant [40, 41], the observed changes in the ohmic resistance will be mainly due to variation of contact between BPP/GDL and GDL/CL interfaces. / ohm decreases in the first cycle of contact pressure as shown in Fig. 17.19 for both the MEAs so contact between BPP/GDL and GDL/CL interfaces has been enhanced. This... 

Length of wires -I- 10% safety factor -j- resistance of wire ohms/ft... 

Remanence, magnetic materials, 12-105 to 113 Resistance of wires, 15-37 Resistivity, electrical alloys, 12-41 to 43... 

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