Question

When a dielectric material is kept in an external electric field, which one of the following phenomena may be realized ? (al Magnetization (b) Polarization (c) Photoionization (d) Circularization​

Answer 1

Answer:

B) Polarization

Explanation:

A dielectric gets polarized when it is placed in an electric field. The field produced due to the polarization minimizes the effect of external field. Hence, the electric field inside a dielectric decreases when placed in an external electric field.

Answer 2

(b). A dielectric material gets polarized when it is placed in an electric field.

Explanation:

• When we place a dielectric slab is in an electric field, then the molecule gains the dipole moment. In such cases, we say that the dielectric is polarized.
• The Electric Polarization is the dipole moment per unit volume of a dielectric material. The polarization is denoted by P.
• Dielectric Polarization occurs when an external electric field is applied to a dielectric substance. When an electric field is applied, it causes charges (both positive and negative) to be displaced. The primary goal of dielectric loss is to connect macroscopic and microscopic features.
• In the case of piezoelectric crystals, polarizing is caused by the action of an electric field or other external forces such as mechanical stress. Solid materials that acquire electric charge are known as piezoelectric crystals.
• Dielectric In pyroelectric crystals, polarizing can also occur spontaneously, especially in ferroelectrics. Ferroelectricity is a property of certain materials in which the spontaneous electric polarization can be reversed by applying an electric field.