Question

Dielectrics which show spontaneous polarization are called as _____________

(a) Pyroelectric

(b) Piezoelectric

(c) Ferroelectric

(d) Centrosymmetric

The question was posed to me in an online interview.

Asked question is from Types of Dielectric Materials topic in section Dielectrics of Engineering Physics II

Answer 1

The correct choice is (d) Centrosymmetric

The explanation is: The Dielectric materials which exhibit spontaneous polarization, i.e., are polarized even in the absence of an applied electric field and whose polarization is reversible are called ferroelectric materials.