A capacitive transducer consists of two plates of diameter 2.2 cm each, separated by an air gap of 0.25mm. Find the displacement sensitivity.
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A simple electrical strain gauge of resistance 120Ω and having a gauge factor 2 is bond to steel having an elastic limit stress of 400MN/m 2 and modulus of elasticity is 200G N/m. Calculate the change in resistance. ...Read more
In the resistance strain gauge arrangement of Fig. 4.72 strain gauge resistance R1=R2=R3=R4= 120ΩEb=9V. If the output voltage of the bridge is 20mV, find the value of force applied to the strip. Thickness t of the strip =1mm. Width b of strip =10mm. Young’s modulus E of strip ma– Read more
In the measurement of surface roughness, height of 20 successive peaks and troughs were measured from a datum and were: 33, 25, 40, 22, 35, 18, 42, 25, 35, 22, 36, 18, 42, 22, 31, 21, 36, 18, ...Read more
A resistance wire strain gauge with a gauge factor of 2 is hounded to a steel structure member is subjected to a stress of 120 MN/m². The modulus of elasticity of steel is 200 GN/m². Calculate the percentage ...Read more
A strain gauge is bended to a beam which is 12 cm long and has a cross-sectional area of 3.8 cm2. The unstrained resistance and gauge factor of the strain gauge are 220 and 2.2 respectively. On the ...Read more
In the measurement of surface roughness, height of 16 successive peaks and troughs were measured from a datum and were: 25, 43, 23, 33, 19, 40, 37, 26, 35, 22, 38, 27, 36, 25, 41 and 21 µm. ...Read more
A quartz crystal has charge sensitivity of 2 pC/N. Its dielectric constant is 4.4 and Young’s modulus is 9×10¹⁰ Pa. Find the voltage sensitivity constant.
An electronic device dissipating 50 W is attached to the inner surface of an isothermal cubical container that is 120 mm on a side. The container is located in the much larger service bay of the space shuttle, ...Read more
A single strain gauge having resistance of 130 Ω is mounted on a steel cantilever beam at a distance of 0.12m from the free end. The beam dimensions are 25 cm (length) x 2.0 cm (width) x 0.3 ...Read more