The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter D. and shape & number of corrugations. Its deflection is proportional to_______________?
Correct answer: D. d4
- A. d
- B. d2
- C. d3
- D. d4
Explanation
For a diaphragm of fixed material and thickness, deflection strongly depends on diameter and varies approximately with the fourth power of diameter, D⁴. This is why diaphragm dimensions and corrugation geometry greatly affect pressure-sensor sensitivity.
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