Definition: In physics, a permittivity (also known as electric permittivity or dielectric constant) is a physical property that describes how an object's ability to store or transmit electrical charge. It is a measure of how much resistance there is between two points in space when charges are placed at those points.
For example, if we have two point charges separated by a distance d, the electric field between them is given by:
E = k
q / r
where E is the electric field
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