Electric Inductance – A vector quantity that characterizes the electric field. It is equal to the sum of two vectors of different nature: electric field intensity ( �) and environmental polarization (p ).
In the Gaussian system of units
�=�+4�p
in BS
�=�0�+p
Here, 0 is the next constant, which is called the electric constant or dielectric constant of vacuum.
In weak fields in an isotropic environment that does not have electromagnetism, the polarization vector is directly proportional to the field intensity.
In the Gaussian system
P=x
Here , X is a constant dimensionless quantity called dielectric permittivity . Dielectric susceptibility to electromagnetism because it depends on the non-linear relationship between Hp and
�=(1+4�x)�=��
�=1+4�x
Its value is called dielectric permittivity of the material.
in BS
P=x0
�=�0��
�=1+x
The purpose of introducing the electric induction vector passing through any closed surface is the flood vector (current) whose vector is determined only by the free charges, not by all the charges inside the volume bounded by the given surface as the flood. This allows not to consider connected (polar) charges and simplifies the solution of many problems.
