engineering recuitment GATE IN Test Series 2023-24 Mock Test Sensors and Industrial Instrumentation Measurement of ACceleration
An accelerometer shown in figure consists of mass weight 0.5 N attached to a spring cantilever. The spring is made up of a material modulus of elasticity 200 GN/m2 and is of uniform rectangular cross section. The output is obtained from a strain gauge bridge comprising four active strain gauges of gauge factor 2. Two strain gauges are mounted on each side of the cantilever. The gauges are connected in a bridge circuit with input voltage of 3 V d.c. Find the bridge output voltage at open circuit for a horizontal acceleration of 4g where q = 9.81 m/s2. The stress is given by \(s = \frac{{6Fl}}{{b{d^2}}}\;N/{m^2}.\)
1
36.93 mV
2
29.35 mV
3
18.93 mV
4
11.52 mV