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”