engineering recuitment GATE IN Test Series 2023-24 Mock Test Sensors and Industrial Instrumentation Resistive Transducers
A bonded metal strain gouge has the following specifications:
Gauge factor = 2.0
Unstrained resistance = 120Ω at 0°C
Maximum operating temperature = 150°C
Temperature co-efficient of resistance = (2 × 10-5)0 C-1
Maximum tensile and compressive strain = 2 × 10-2
Two strain gauges, with the specifications given above are mounted on a structural member in a push-pull configuration, connected in a bridges along with two standard resistance, whose output is fed to an amplifier as shown in the figure. The output voltage Vo per unit battery voltage, under maximum toading is
1
-0.4 V
2
-0.30 V
3
0.30 V
4
0.4 V