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CBSE Class 12-science Answered

meaning of permitivity
Asked by | 05 Apr, 2008, 02:13: PM
answered-by-expert Expert Answer

It is easier to understand what is permittivity if you think how it affects the force between two charges. Say you have two charges placed in air at a distance r from each other. Next place the same two charges in water again at a distance r. How is the force between the charges affected? It decreases. Now which factor has changed?

It is only the interveing medium between the two charges. This means that the permittivity of the medium has changed. If the medium has a large permittivity the force between the charges becomes less.

The permittivity of a medium with respect to vacuum or relative permittivity is the dielectric constant of the medium.

Answered by | 05 Apr, 2008, 05:35: PM
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