Coulombs Law

Question

Explain the statement ‘Relative permittivity of water is 81’

Solution

Relative space permittivity comma space straight K space equals space straight epsilon over straight epsilon subscript straight o space equals space straight F subscript mod over straight F subscript straight o

For water K = 81;
This means the force between two charges in water is 81 times less than the force between charges in vacuum (or air).