Question

Why does the electric field innside a dielectric decrease when it is placed in an external electric field ?

Answer 1

The net electric field inside a dielectric decreases due to polarization. The external electric field polarizes the dielectric and an electric field is produced due to this polarization. This internal electric field will be opposite to external electric field and therefore the net electric field inside the dielectic will be less.

Answer 2

Answer:The dielectric material get polarized when it is placed in an electric field. The field produced due to the polarization of the material minimize the effect of external field. Hence, the electric field inside a dielectric decreases when it is placed in an external electric field.

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Explanation: