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A piezoelectric crystal is characterized by a constant, 12 × 10-13 (V/m)
/ (N/m2). The diameter of crystal is 8 mm, thickness is 2 mm and leakage
resistance is 108 Ω.
[1]. Determine the sensitivity of crystal for measurement of displacement in
V/m?
[2]. Also what will be the output voltage for an input force of 10 N?
[3]. If above crystal is connected to an amplifier with input capacitance of 4
× 10-10 F and resistance of 108 Ω. The connecting cable has a capacitance of
2 × 10-10 F. Determine the time constant for measurement of displacement.
[Dielectric constant = 1.250 × 10-8 F/m and Young’s modulus of 1.2 × 10-11 N/m2].
( Please answer all parts)
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