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Circuit Simplification
Published in Nassir H. Sabah, Circuit Analysis with PSpice, 2017
It may be noted that the condition in Figure 5.33, when nodes ‘b’ and ‘c’ are at the same voltage is referred to as bridge balance, and the bridge is said to be balanced under these conditions. The resistive bridge circuit is of considerable practical importance and is known as a Wheatstone bridge. It is discussed in Appendix 5A.
Experimental investigation of solar evacuated tube collector with multi-walled carbon nanotube-water-based nanofluid
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2023
Raju Thota, Agnimitra Biswas, Biplab Das, Anal Ranjan Sengupta
Here thermal conductivity and zeta potential of MWCNT-water-based nanofluids are evaluated. Electric charge at the shear plane on the surface of the nanoparticles is known as zeta potential. The KD2 probe, which relies on the transient hot wire (THW) approach (Kumar and Kaushal 2020), is used to enumerate the thermal conductivity of the prepared nanofluid in the range 0.02–2.00 W/m-K, with an accuracy of 0.01 W/m-K. In the THW method, an infinitely long and thin wire (length 0.8 m) is used as a heat source, which is heated electrically. The wire submerged in the liquid provides a constant heat flux. The wire dissipates heat, causing the wire temperature to vary over time. To measure a change in resistance, the Wheatstone bridge circuit is used. Finally, the value of thermal conductivity of the nanofluid based on a change in temperature slope with logarithmic time heating is calculated.
Monitoring structural responses during load testing of reinforced concrete bridges: a review
Published in Structure and Infrastructure Engineering, 2022
Gabriela Irene Zarate Garnica, Eva Olivia Leontien Lantsoght, Yuguang Yang
Bonded electrical resistance strain gauges are the most used type of sensor for bridge load tests. An electrical resistance strain gauge consists of a thin metallic film deposited on a non-conducting plastic film (Aktan et al., 2003). The operating principle relies on the relationship that the resistance of a conductor will change directly proportional to a change in its length, and this change in electrical resistance is related to strain. Electrical strain gauges are available with nominal resistance values from 30 to 3000 Ohm (National Instruments, 1998). A Wheatstone bridge circuit converts the change in resistance to voltage. Figure 5 shows the scheme of a strain gauge.