Question

Certain crystals produce electric signals on application of pressure. This phenomenon is called
A) Pyroelectricity
B) Ferroelectricity
C) Piezoelectricity
D) Ferrielectricity

Answer 1

Hint: The mechanical work is converted to electrical work by various processes. This process generates electricity. Crystals absorb mechanical work to produce electrical work in piezoelectricity.

Complete Step by Step Answer:
Piezoelectricity is defined as the process of using some solid or crystals to convert mechanical energy into electrical energy, or electrical energy into mechanical energy by the application of certain pressure on the crystal. The regular crystals or solids are defined by their organised structure of atoms that are held together by strong electrostatic force of attraction, these crystals called a unit cell.

Pyroelectricity is defined as the phenomenon of generating some temporary voltage by some materials when they are heated or cooled. This change in temperature when heated or cooled changes the positions of the atoms slightly within the crystal structure.

Ferroelectricity is defined as the characteristic of a certain material which has a spontaneous electric polarisation that can be easily reversed by the application of an external electric field.
Thus the correct option is C.

Note: There are some disadvantages to the piezoelectricity present. Piezoelectricity has a high sensitivity of temperature. Some crystals are water soluble and react with water or with solvent. The piezoelectric transducer is not suitable for static measurement. It is only used for dynamic measurement.