Your book is correct. It is 1 and is dimensionless.Hardik Batra said:In my book it is said the CGS unit value of k is 1.
The coulomb constant, also known as the electric constant or vacuum permittivity, has a value of approximately 8.9875517923 x 10^9 N⋅m^2⋅C^-2.
Coulomb constant is measured in units of newton meters squared per coulomb squared (N⋅m^2⋅C^-2).
The coulomb constant is important because it is a fundamental constant in electrostatics, serving as a proportionality constant between electric charge and electric force.
The coulomb constant is related to other fundamental constants, such as the speed of light and the permittivity of free space, through the equation k = 1/(4πε_0c^2), where ε_0 is the permittivity of free space and c is the speed of light.
No, the value of the coulomb constant is a fixed constant and does not change. It is considered a fundamental constant of nature.