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what is the unit of permitivity?how can be found it? |
| Symbol: e Unit: farad meter-1 (F m-1) The permittivity of a substance is a characteristic which describes how it affects any electric field set up in it. A high permittivity tends to reduce any electric field present. We can increase the capacitance of a capacitor by increasing the permittivity of the dielectric material. The permittivity of free space (or a vacuum), e0, has a value of 8.9 × 10-12 F m-1. The permittivity of a material is usually given relative to that of free space, it is known as relative permittivity, er. Permittivity is then calculated by multiplying e0 by this figure. |
