In the last article, I have discussed the dielectrics and polar dielectrics. Today let us discuss the non-polar dielectrics:
Non-polar Dielectrics or Molecules. If the centre of gravity of positive charges coincides with the centre of gravity of negative charges then the dielectric is called non-polar dielectric.
Example. H2, N2 etc.
Thus, a non-polar dielectric has a zero electric dipole moment In the presence of electric field, the charge centres get displaced and dielectric or molecule is then said to be polarized and therefore dielectric acquire an induced dipole moment in the direction of the field.
Note : After reading this article, you will be able to answer the following questions:
What are non-polar dielectrics,
What are non- polar molecules,
Write the examples of non-polar dielectric materials,
Why non-polar molecules have zero dipole moment
Dielectrics are the materials which do not contain free charges for conduction.
Thus, dielectrics are basically insulators as insulators do not conduct electricity through them. But, dielectrics, contain positive and negative charges which are bounded together and these charges could be effected by
the electric field. The main function of dielectric is the charge storage.
POLAR AND NON-POLAR DIELECTRICS
An atom contains a positive charge in the nucleus and negative charge (electrons) orbitting around the nucleus. The positive as well as the negative charges can be considered to be concentrated at a point. The point at which the positive charge can be assumed to be concentrated is termed as the centre of gravity of the positive charge. Similarly, the point at which the negative charge can be assumed to be concentrated is termed as the centre of gravity of the negative charge. Now we can define the polar and non-polar dielectrics as :
Polar Dielectrics or Molecules: Continue reading “Dielectrics and their types”