List of top Geomechanics and Ground Control Questions on Strain Gauge Testing asked in GATE MN

In a uniaxial compressive strength test, a \(120\ \Omega\) strain gauge of gauge factor 2.0 is pasted on the rock sample as shown. At the end of the test, the change in resistance of the strain gauge is \(0.5\ \Omega\). The longitudinal deformation of the sample, in \(mm\), is . (rounded off to two decimal places)