Question

Piezoelectric effect is when materials produce electric charges when ____________

(a) Voltage is applied

(b) Mechanical Stress is applied

(c) Electric field is applied

(d) Magnetic field is applied

I have been asked this question during a job interview.

I would like to ask this question from Piezoelectricity topic in section Dielectrics of Engineering Physics II

Answer 1

Right option is (b) Mechanical Stress is applied

For explanation I would say: Certain materials produce electric charges on their surface when mechanical stress is applied on them. This effect is called piezoelectric effect.