E6D03 - Amateur Extra Class

E6D03 : Which of the following is an aspect of the piezoelectric effect?
A Mechanical deformation of material due to the application of a voltage
B Mechanical deformation of material due to the application of a magnetic field
C Generation of electrical energy in the presence of light
D Increased conductivity in the presence of light
Correct Answer: Mechanical deformation of material due to the application of a voltage