So the electrostatic constant k = 9*10^9, but I've also seen it written in my Fundamentals of Phys book (Resnick) and Wikipedia as k = 1/(4*pi*e0). Why is this? Thanks.
The ε0 is a constant called the electric permittivity of free space. Read about it here: http://hyperphysics.phy-astr.gsu.edu/HBASE/electric/elefie.html#c3"Pupil said:So the electrostatic constant k = 9*10^9, but I've also seen it written in my Fundamentals of Phys book (Resnick) and Wikipedia as k = 1/(4*pi*e0). Why is this? Thanks.
The electrostatic constant, also known as the vacuum permittivity or electric constant, is a physical constant that relates the strength of an electric field to the magnitude of electric charges in a vacuum.
The electrostatic constant is measured by calculating the force between two stationary charged particles in a vacuum, and then dividing that force by the product of the charges and the square of the distance between them.
The value of the electrostatic constant is approximately 8.854 x 10^-12 farads per meter (F/m) in the International System of Units (SI).
The electrostatic constant is an important fundamental constant in electromagnetism and plays a crucial role in understanding the behavior of electric charges. It is also used in many practical applications, such as in the design of electronic devices and in the study of electrostatic phenomena.
Coulomb's law, which describes the force between two stationary charged particles, includes the electrostatic constant as a proportionality constant. This means that the electrostatic constant determines the strength of the force between charged particles in a vacuum.