Question

K for water is 80 . what is the permittivity of water

Answer 1

Permittivity is one of the fundamental material parameters that affect the propagation of Electric Fields. Permittivity, typically denoted by the symbol ɛ (lowercase Epsilon), is a measure of how much the molecules of a material oppose an external electric field. The relative permittivity of a material compared to the permittivity of a vacuum (no electrons present) is known as the Dielectric Constant of the material.

The permittivity of free space (a vacuum) is a physical constant equal to approximately 8.85 x[math] 10^{-12}[/math] farad per meter (F/m).By definition,

permittivity of water = dielectric constant x permittivity of vacuum

Therefore,

permittivity of water = 80.10 x 8.85 x[math] 10^{–12}[/math] = 7.08885 x [math]10^{–10}[/math] farad/metre

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Answer 2

Answer:

Water's dielectric constant of 80 means that electric fields are reduced by 80 times in water compared with their values in vacuum. But it seems to change when water is confined in a small space, such as between a pair of membranes as part of a plant cell's photosynthetic machinery.