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In this blog you will find around 320 solved Geophysics GATE and CSIR-NET and other competitive exams solutions with a better explanation. Please follow and share if you like it.
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normal device resistivity formula
GATE-2016 40. In resistivity logging using a 'Normal device' the distance between electrodes A and M is 0.40m . If 20mA current generates 10mV potential the apparent resistivity of the …