Technician A says that piezoelectric effect is reversible. Technician B says that piezo actuators respond more slowly to inputs because they are required to build a magnetic field before a mechanical response results. Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

The piezoelectric effect is indeed reversible, meaning that applying an electric field to a piezoelectric material will cause it to change shape (mechanical deformation), and conversely, mechanically deforming a piezoelectric material will produce an electric charge. Technician B is incorrect because piezo actuators do not rely on building a magnetic field for their operation; they respond quickly to electrical inputs due to the direct conversion between electrical energy and mechanical displacement.

Technician a Says That Piezoelectric Effect Is Reversible