CBSE Class 12-science Answered
is the permittivity changes with the material or remain constant value?
Asked by Aysha | 22 Jun, 2015, 05:25: PM
Expert Answer
The permittivity of a material is defined as ε=εrε0,
Where, εo =absolute permittivity and εr is the relative permittivity.
The permittivity of vacuum is defined as the physical constant ε0, which is approximately ε0 = 8.854 x 10-12 farads C2N-1m-2.
εr is a number which is always greater than 1 and depends on many factors, such as temperature, pressure and even frequency. So, different materials have different values of relative permittivity.
Answered by Yashvanti Jain | 15 Dec, 2017, 03:46: PM
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