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The mechanical deformation of piezoelectric materials caused caused by an external electrical field is known as

The mechanical deformation of piezoelectric materials caused caused by an external electrical field is known as Correct Answer Inverse piezoelectric effect

Concept:

When one pair of opposite faces of certain asymmetric crystals such as quartz is compressed, opposite electric charges appear on the other pair of opposite faces of the crystal. If the crystals are subjected to tension, the polarities of the charges are reversed.

This development of charges as a result of the mechanical deformation is known as the direct piezoelectric effect.

Crystals that exhibit piezoelectric effect are called piezoelectric crystals.

Ammonium phosphate, quartz, PZT (lead zirconate titanate) are examples of piezoelectric materials.

The converse effect can also occur. If an electric field is applied across one pair of faces of a piezoelectric crystal, it gets deformed along the direction of the opposite pair of faces.

This mechanical deformation of piezoelectric materials caused by an external electric field is known as the inverse piezoelectric effect.

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Magnetostriction effect: When a rod of ferromagnetic material such as iron or nickel is kept in a magnetic field parallel to its length, the rod suffers a change in length.

The change in length is independent of the direction of the magnetic field and depends only on the magnitude of the field and nature of the material. This phenomenon is called as Magnetostriction effect.

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