Strains measured as the bar was pulled in tension were used


Two strain gauges were mounted on opposite sides of a tensile specimen. Strains measured as the bar was pulled in tension were used to compute Young's modulus. Readings from one gauge gave a modulus much higher than those from the other gauge. What was the probable cause of this discrepancy?

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Mechanical Engineering: Strains measured as the bar was pulled in tension were used
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