True

Under the influence of an electric field, dielectric materials will get charged instantaneously. This phenomenon is due to the polarization of the dielectric material.

Explanation:

Dielectric materials are non-conductive substances that can be polarized when subjected to an electric field. When an electric field is applied to a dielectric material, the positive and negative charges within the material experience a force that causes them to separate, resulting in the material becoming polarized.

Polarization of Dielectric Materials:

Dielectric materials consist of atoms or molecules with a positive nucleus and negatively charged electrons. In their natural state, the charges are balanced and distributed evenly, resulting in no net charge. However, when an external electric field is applied, the charges within the dielectric material will experience a force.

Alignment of Charges:

Under the influence of the electric field, the positive charges within the dielectric material will be attracted towards the negative terminal of the electric field, while the negative charges will be attracted towards the positive terminal. This alignment of charges creates an induced dipole moment within the dielectric material.

Instantaneous Charging:

The polarization of dielectric materials occurs almost instantaneously. As soon as the electric field is applied, the charges within the material will start to align themselves in response to the field. This alignment happens very quickly, typically within microseconds or even nanoseconds.

Dielectric Constant:

The ability of a dielectric material to become polarized is quantified by its dielectric constant. The dielectric constant represents the ratio of the electric field strength in a vacuum to the electric field strength in the dielectric material. A higher dielectric constant indicates a stronger polarization effect.

Conclusion:

Under the influence of an electric field, dielectric materials get charged instantaneously due to the polarization effect. This instantaneous charging allows dielectric materials to store electric energy and play a crucial role in various electrical applications, such as capacitors.