Force of electrostatic interaction represents force with which charged particles work at each other. Expression was open for it by the physicist Charles Coulon in honor of whom this force also was called.
Sil Kulon
It is known that the particles having some charge are attracted to each other or make a start with a certain force. This physical phenomenon leads to similar interaction between macroscopic bodies if the total charge in them is not compensated and has some size. The expression determining the size of force of electrostatic interaction was received by practical consideration in an experiment with interaction of two loaded balls. The obvious dependence of size of force on the size of a charge of samples and also on distance between them was revealed.
Dependence on a charge
So, force of the Pendant describes interaction of the loaded objects. To describe degree of their state of charge, the physical quantity called a charge and measured in Pendants was entered. Need of introduction of this size followed from the above-stated experience in which force of interaction of the same loaded balls increased at addition of a charge of the same sign by it. At the same time, as we know, the size of a charge has some sign. Therefore it is worth specifying that force of the Pendant is directly proportional to the module of sizes of charges of particles. Pay attention that, speaking about force of electrostatic interaction, mean interaction of material particles. That is expression of the Pendant becomes unfair by consideration of macroscopic bodies which size and a form it is far from a material point.
Dependence on distance
The dependence of force of electrostatic interaction on distance between particles is especially remarkable. It is known that force of the Pendant is inversely proportional to a distance square between particles. Thus, change of distance leads to change of force four times twice. The similar dependence is also characteristic of the gravitational force of an attraction. As the size of distance costs in an expression denominator for force, also two extreme values follow from here. The first of them treats a case of zero distance between charges, then force strives for infinity. This situation, on the one hand, is unrealizable because growth of force results in impossibility of contact of particles, but on the other hand, the similar effect is observed when forming atom. Actually, at rapprochement of subatomic particles of the same sign occurs or annihilation if it is electrons, or juicy synthesis and formation of atom if it is protons, due to emergence at a certain stage of rapprochement of nuclear force of an attraction.
Dependence on Wednesday
If interaction of charged particles happens not in a vacuum, and in some continuous environment, then force of the Pendant will depend also on electric properties of the environment. This phenomenon is expressed mathematically in the emergence of additional coefficient of proportionality called a dielectric constant of the environment.