MODEL MICRO-RESISTIVITY EXPERIMENTS

Abstract

Model micro-resistivity experiments were carried out in a tank with a.view to studying the response, under controlled conditions, of electrically conducting and non-conducting bodies to Wenner System of Electrode Configur<i-ti.on. The model materials used were of Copper, Alin iniun, Brass, graphite and Bakelite in the form of sheets, cylinders and folds which had the same lengths and widths. The thicknesses of Copper, Aluminium, Brass and Bakelite sheets were 1.4mm, 1.5 mm, 1.5 mm and 1.5 mm respectively whilst that of the graphite was 1085 cm about 1? times more than those of the other models. The models were held at the same position in the tank and their responses were studied, using the wanner profiling system of electrode configuration. Additionally, a comparative study of their responses under similar conditions was also made. The experiments were made by using a specially designed persp+ x platform pierced by precisely machined holes which apart from ensuring accurate positioning of the electrodes with respect to the model also enabled direct currents to be used by eliminating polarizing effects. Important factors like, the equipment used, type of electrodes, dimensions of the tank were given due consideration in the light of the resistivity method, as mentioned in the Following chapters. ..s 2 s• The results obtained are shoum in the form of curves. The results have been analysed in order to know the behaviour of the bodies,