Coulomb interaction belongs to the description of the electrostatic phenomena of interaction of electric charges or charged bodies with each other. The result of this interaction is defined by Coulomb forces.
It is required to you
- The textbook in physics of the 10th class, the sheet of paper, a pencil.
Instruction
1. Open the textbook in physics of the tenth class on a subject of the electric phenomena and read as charged bodies and particles interact with each other. It is known that the charges of the same name, that is charges of the same sign, make a start, and the heteronymic charges having various sign of a charge make a start. The reason of their interaction also is in so-called Coulomb interaction of charges.
2. Remember that charges create in space around themselves electrostatic field. Draw the fat point representing a charge on the sheet of paper. Carry out from it radially several beams. These beams show lines of the electric field formed by a charge. Specify, for example, the positive sign of the charge drawn with you. Then it is possible to specify on lines of the field arrows in the direction from a charge. Thus, now any point of space (two-dimensional) is in your case under the influence of a force field of the charge drawn with you. It means that if to place any second charge in any point, that field of the first charge will use the force on it with some. This interaction is also called Coulomb as force of this interaction was determined by Charles Coulon.
3. Write out the formula expressing force of Coulomb interaction from the textbook. This force is directly proportional to sizes of the interacting charges and is inversely proportional to a distance square between them. It means that the it is more than a distance between charges, the less force of Coulomb interaction and vice versa.
4. Do not forget that when placing the second charge in the field of the first the first also appears in the field of the second. It means that Coulomb interaction same for each of charges, but does not belong to separately to each of them. In this plan this interaction is very similar to usual gravitational interaction if in its expression to replace masses with sizes of charges.
5. Pay attention to the feature of Coulomb interaction which is that it does not depend on the mass of charges. Thus, if, say, the proton and an electron which mass is one thousand times less than the mass of a proton interacts, then force of Coulomb interaction will be the same as in case two electrons or two protons interact.
6. Notice that Coulomb interaction of charges leads to formation of atom – one of units of the structure of substance.