When a strain gauge is stretched under axial tension, its resistance varies with the imposed strain. A resistance bridge

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When A Strain Gauge Is Stretched Under Axial Tension Its Resistance Varies With The Imposed Strain A Resistance Bridge 1 (55.15 KiB) Viewed 39 times

When a strain gauge is stretched under axial tension, its resistance varies with the imposed strain. A resistance bridge circuit is used to convert the resistance change into voltage as shown in Figure i) Distinguish among stress and strain. ii) In Figure the 120 2 strain gauge with a gauge factor of 2 is mounted on a rectangular steel bar (Em = 200 GPa, 3 cm wide and 1 cm high) and connected to bridge circuit with input voltage, Ei= 5 V. If the voltmeter shows 1.25 mV, calculate the amount of tensile load applied to the steel bar. E₁ Gauge Figure E Tensile loading 3cm 1 cm