What is an electric field?
Electric field can be considered as a sphere of influence of an electrically charged object. Everything that has an electric charge will affect and will be influenced by other charged bodies. If two charged objects are placed close enough to each other, each experiences the measurable power that acts on it. The field is theoretically endless in the extent, but its size decreases with a distance from the source under the Act on the Inversion Square Act. This means that if the distance is doubled, the field strength is divided by four and at three times the distance is divided by nine etc.; The field therefore becomes negligible over long distances.
Since the electric charge can be positive or negative, the electric field is a vector field, which means it has direction and size. Two electrically charged objects will experience a repulsive force if they have the same type of charge and attractive force if they have different types. The power that has a charged object in an electric field can be calculated as f = eq where f is the force in Newton, E is an electric field inE volts per meter (V/M) and Q is a charge in Coulombs. This equation can be regrouted to provide field strength, e, volts per meter: E = f/Q. These examples apply to small, point objects; For more complex or more charged bodies, calculations are more complicated.
The direction of the electric field is defined as a direction in which the electrical force would perceive an object with a positive charge located in the field. The field would therefore refer to a positive charge and towards the negative charge, as they repel similar fees and, unlike fees, attract. In the case of two bodies with the same type of charge, each would experience the strength - calculable equation f = ekv.cesta from the second building. On the contrary, for two contradictory bodies, each would experience the strength towards another object.
The electric field can be drawn with an arrow pointing from a positive charge and aiming to a negative charge. So a positively charged object would beShown with lines of fields that point from it in all directions, and a negatively charged object with field lines that converge on it. However, it is only a convention and does not indicate that there is something physical direction in a certain direction.
The concept of the electric field, as described above, is part of "classic" physics. The classic description works well for everyday applications, but does not explain what is actually happening when the charged objects attract or repel each other. The branch of quantum theory known as quantum electrodynamics (QED) attempts to do this in terms of the replacement of photons, carriers of electromagnetic force. <<