According to National Geographic, electricity comes from energy sources such as fossil fuels, wind energy and hydroelectric power. Electricity is transported from a power station via power lines that carry electrical current into communities.
A:Wind turbines turn the kinetic energy of the wind into mechanical energy and then electricity through the use of a shaft and a gearbox that power an internal generator. Sensors in the wind turbine allow it to turn and adjust its angle for optimum wind capture. Electricity from the turbine generator goes to a substation, where it is converted to a high voltage capable of transportation through power lines.
A:A wire ampacity table is a chart displaying the electrical amp rating carried by specific wire types and gauge sizes. Amperage is a measure of the electrical current flowing through a circuit, which is measured in amps. Proper wire size must meet specific amp limits.
A:Hydroelectric power is the converting of energy coming from running water to produce electricity. Hydroelectricity is a similar term that refers to the electricity that is produced from this process.
A:According to National Geographic, electricity comes from energy sources such as fossil fuels, wind energy and hydroelectric power. Electricity is transported from a power station via power lines that carry electrical current into communities.
A:According to the Encyclopedia Britannica, in terms of classical theory, electromagnetic radiation refers to energy that flows at the universal speed of light via free space or a material medium in the form of electric and magnetic fields that comprise electromagnetic waves, such as radio waves, gamma rays and visible light. Electromagnetic waves are characterized by their intensity and the frequency of the electric and magnetic field's time variation.
A:Electric trains use electricity to power electric motors, driving their wheels and providing locomotion. The electricity comes from one of three sources. It is either delivered via an electrified third rail beneath the train, via electrified cables above the train, or stored in batteries on board the train.
A:Calculating electric field intensity requires the knowledge about the current charge level of the object that is making the electric field and the distance between that charged object and the measuring tool. Electric field intensity (or strength) is a vector quantity, which means it has direction as well as magnitude. The magnitude of this intensity comes from the way it is measured.
A: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.
A:Resistance occurs when the electrons carrying an electrical charge collide with the atoms of a wire and are impeded. A longer wire provides more opportunities for collisions, which in turn creates greater resistance.
A:Electrostatic discharge, or ESD, is a sudden flow of electric current between two objects that have different electronic potentials. An electric spark is a type of ESD wherein there is a flow of electric current across an air gap, increasing the air temperature, which produces light and sound emission.
A:At the beginning of the 20th century, French engineer, chemist and inventor Georges Claude invented the neon lamp. He sent electricity into a tube of neon gas, which had been discovered by William Ramsey and M. Travers in 1898.
A: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.
A:According to the BBC, potatoes produce electricity by virtue of their acidic juice, which reacts with two electrodes placed in the potato. The chemical reaction produces a weak current between the two electrodes.
A:Silver is the best metal conductor, but graphene is the best overall material at conducting electricity. Graphene consists of carbon atoms arranged in extremely thin sheets, and has the lowest electrical resistance of any commonly known material.
A:Windmills produce electricity by electromagnetic induction, the process in which the movement of magnets in a magnetic field generates electricity. In a windmill, when wind moves the blades of the windmill that move the rotor, the rotor rotates a shaft that holds magnets in the magnetic field of the generator, generating alternating current that is sent along power lines.
A:When a short circuit occurs, electrical current experiences little to no resistance because its path has been diverted from its normal direction of flow. This in turn produces excess heat and can damage or destroy an electrical appliance. It can also create a fire hazard and an electrical shock hazard if left unattended
A:Non-renewable energy means the energy source will eventually run out. Most of the non-renewable energy sources belong to the fossil fuel category. Coal, natural gas, crude oil and liquid petroleum gas are examples of non-renewable energy sources.
A:Lightning is usually white, but it can be a variety of colors depending on what the light travels through to get to the viewer’s eyes. In snowstorms, lightning can appear pink or green. Particles in the atmosphere affect the color by absorbing or diffracting a portion of the white light.
A:A lightning rod conducts a positive charge up to meet the negative charge of a lightning strike, allowing the strike to hit the rod and travel through attached wires to an underground connection. This diverts the strike away from a building, preventing or lessening potential damage, according to About.com.