What is Coulomb interaction?
You will need
- Textbook on physics 10 class, a sheet of paper, a pencil.
Open the tenth grade physics textbook on electrical phenomena and read how charged bodies and particles interact with each other. As is well known, like charges, that is, charges of the same sign, repel each other, while opposite charges with different charge signs repel each other. The reason for their interaction lies in the so-called Coulomb interaction of charges.
Recall that charges create an electrostatic field in the space around them. Draw on a piece of paper a bullet depicting a charge. Spend from it radially several rays. These rays show the lines of the electric field formed by the charge. For example, indicate the positive sign of the charge you have drawn. Then it is possible to indicate arrows in the field lines in the direction from the charge.Thus, now any point of space (two-dimensional in your case) is under the influence of the force field of the charge drawn by you. This means that if you place any second charge at any point, then the field of the first charge will act on it with some force. This interaction is called Coulomb, because the strength of this interaction was determined by Charles Coulomb.
Write out from the textbook a formula expressing the power of Coulomb interaction. This force is directly proportional to the magnitude of the interacting charges and inversely proportional to the square of the distance between them. This means that the greater the distance between the charges, the smaller the force of the Coulomb interaction, and vice versa.
Do not forget that when a second charge is placed in the field of the first, the first also appears in the field of the second. This suggests that the Coulomb interaction is the same for each of the charges, and does not apply to each of them separately. In this regard, this interaction is very similar to the usual gravitational interaction, if in its expression the mass is replaced by the magnitude of the charges.
Pay attention to the peculiarity of the Coulomb interaction, which consists in the fact that it does not depend on the mass of the charges.Thus, if, say, a proton interacts with an electron, whose mass is a thousand times smaller than the mass of a proton, then the force of the Coulomb interaction will be the same as if two electrons or two protons interacted.
Note that it is the Coulomb interaction of charges that leads to the formation of an atom - one of the units of the structure of matter.
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