Correct Answer - Option 4 : Barium titanate and quartz
Piezoelectric Materials:
Piezoelectric materials are materials that can produce electricity due to mechanical stress, such as compression. These materials can also deform when a voltage is applied.
All piezoelectric materials are non-conductive for the piezoelectric effect to occur and work. They can be separated into two groups:
Some examples of piezoelectric materials are PZT (also known as lead zirconate titanate), barium titanate, and lithium niobate. These man-made materials have a more pronounced effect than quartz and other natural piezoelectric materials.
