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Dielectrics is considered one of the most asked concept.
67 Questions around this concept.
When the air in a capacitor is replaced by a medium of dielectric constant K, the capacity,
In the absence of an applied electric field in non-polar materials, that possess non-zero net dipole moment, the electric polarization vector in this
. As shown in the figure, a very thin sheet of aluminium is placed in between the plates of the condenser. Then the capacity
In the absence of an applied electric field in nonpolar dielectric materials, charges are arranged in such a way that
In polar materials, dipole moment of all dipoles in the absence of electric field is
The dielectric constant k of an insulator cannot be :
Choose the correct statement:
When a dielectric material is introduced between the plates of a charge condenser, then electric field between the plates
With the rise in temperature, the dielectric constant
A capacitor has air as a dielectric medium and two conducting plates of area
Dielectric: A dielectric is an insulating material in which all the electrons are tightly bounded to the nuclei of the atoms and no free electrons are available for the conduction of current. They are non-conducting materials. They do not have free charged particles like conductors have. They are of two types.
1. Polar : The centre of +ve and -ve charges do not coincide. Example
2. Non-Polar: The centers of + ve and -ve charges coincide. Example
electric field Eo . Then net electric field E is given by
This indicates that net electric field is decreased when dielectric is introduced.
The ratio
So,
or
or
or
or
or
or
or
This is irrespective of the thickness of the dielectric slab,i.e., whether it fills up the entire space between the charged plates or any part of it.
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