The output voltage of piezo- electric crystals is given by: E=t.g.p; where t is the crystal thickness, g
its voltage sensitivity and p is the acting pressure.
For a quartz crystal 2mm thick with voltage sensitivity of 0.055V(m)/(N), determine:
a) the output voltage when subjected to a pressure of (10)/(b)ar .
b) If the uncertainty in the voltage measurement is +-5V and the uncertainty in the thickness
measurement is +-7.5mu m, estimate the uncertainty in the measured pressure.
17. The output voltage of piezo- electric crystals is given by: E = t.g.p; where t is the crystal thickness, g its voltage sensitivity and p is the acting pressure. For a quartz crystal 2 mm thick with voltage sensitivity of 0.055 Vm/N, determine:
b) If the uncertainty in the voltage measurement is 5 V and the uncertainty in the thickness measurement is 7.5 um, estimate the uncertainty in the measured pressure