Table of Contents
How does the electric field inside a dielectric?
A dielectric material gets polarized when it placed in an electric field. The field produce due to the polarization of material minimize the effect of external field. Hence, the electric field inside a dielectric decreases when it is placed in an external electric field.
What is the net field inside the dielectric?
But inside the dielectric, the net charge is zero even in a small volume. So the dielectric in the external field is equivalent to two oppositely charged sheets with the surface charge densities +σb and –σb. These charges are called bound charges. They are not free to move like free electrons in conductors.
What is meant by dielectric explain how it reduces electric field?
As the non-polar dielectric slab is introduced between two oppositely charged plates, each molecule of the non-polar dielectric slab gets polarized. Hence on placing a dielectric slab inside as electric field, the strength of the electric field gets reduces because of two opposing electric fields.
Why the electric field is zero inside a dielectric give reason?
Due to a large number of electrons, the force of repulsion acting in between them is also very high. Hence in order to minimize the repulsion between electrons, the electrons move to the surface of the conductor. Hence we can say that the net charge inside the conductor is zero.
How does dielectric decrease electric field?
The positive charges within the dielectric are displaced minutely in the direction of the electric field, and the negative charges are displaced minutely in the direction opposite to the electric field. This slight separation of charge, or polarization, reduces the electric field within the dielectric.
Why does the electric field inside a dielectric decrease when it is placed in an external electric field and increased when placed in the capacitor?
A dielectric gets polarized when it is placed in an electric field. The field produced due to the polarization minimizes the effect of external field. Hence, the electric field inside a dielectric decreases when placed in an external electric field.