Electrical fields are caused by the attraction and repulsion of electrical charges. Electrical fields are measured using volts per meter and are central to the functioning of electrically-powered devices, such as televisions, light bulbs and computers.Continue Reading
The electrical field is always directed away from positive source charges and towards negative source charges. The attraction-repulsion quality of electrical fields takes place when a balloon generates static electricity after being rubbed against hair or fur. In this instance, a charged balloon attracts an oppositely charged balloon even when they are not in contact. The unit of static electricity was created to describe the non-contact force observed on objects with static charges and was central in defining the concept of electric fields, according to The Physics Classroom.
The intensity of an electric field in an electronic appliance, such as a lamp, is affected by the power supply of the appliance -- the higher the power supply, the greater the intensity of the electrical field. A common power supply is an AC power plug and socket, although batteries are also used to generate electrical fields within electronic devices. An electrical field is also similar to the gravitational field because both are forces that act over a distance separating two objects, or action-at-a-distance forces.Learn more about Electricity
Moving electric charges will interact with both electric and magnetic fields. Electric fields exert forces on charges regardless of whether or not they're moving. However, magnetic fields only interact with moving charges.Full Answer >
Copper is a good conductor of electricity because the valence electrons are free and repel each other so strongly that it causes the repulsion of other electrons. This essentially forces the electricity down the piece of copper, or conducts it down the metal.Full Answer >
Charles-Augustin de Coulomb invented the device known as the torsion balance, which could measure minuscule changes and then provide an estimate on the force of repulsion or attraction between the two present charged bodies. Coulomb gathered data from his torsion balance, which later provided him with the information he needed to create Coulomb's law.Full Answer >
Magnetic attraction and repulsion are demonstrated by bringing two magnets in close contact. When the like poles are near each other, they will attract the two magnets together, and when the different poles are near, they push the magnets away from each other.Full Answer >