Electricity

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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.

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  • What are examples of conductors?

    Q: What are examples of conductors?

    A: Examples of conductors include the human body, metals, aqueous solutions of salt, graphite, copper, silver and gold. Conductors are materials that can transfer heat and transmit electricity. Conductors have a high density, allowing particles to flow freely and collide.
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  • How do wind turbines work?

    Q: How do wind turbines work?

    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.
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  • What is static electricity and how does it affect everyday life?

    Q: What is static electricity and how does it affect everyday life?

    A: Static electricity results from an imbalance between positive and negative charges in an object, according to the Library of Congress. It affects daily life in numerous ways, such as causing hair to rise when a person removes his hat as the electrons get transferred from the hat to the hair.
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  • How are current and voltage related?

    Q: How are current and voltage related?

    A: Voltage, or electrical pressure, in a system produces a proportionate amount of current when placed across electrical resistance. Ohm's law indicates that 1 volt passed through 1 ohm of resistance produces 1 ampere of current, or electrical flow. Voltage and current, therefore, have a direct relationship most of the time.
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  • How does a switch work on a circuit?

    Q: How does a switch work on a circuit?

    A: A switch works by interrupting current flow around an electrical circuit. A basic switch is a binary device: it is either open (off) or closed (on). The simplest type of switch is one that comprises two metal strips that are brought into contact by a spring or some other form of actuating mechanism.
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  • How do solar cells work?

    Q: How do solar cells work?

    A: Solar cells work by collecting sunlight and converting it to usable energy. This energy can be used onsite or transported short distances to the local power grid. A typical modern solar cell consists of a transparent protective outer layer, a dark layer to absorb photons and a network of support systems underneath to improve the cell's operational efficiency.
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  • How does a potato conduct electricity?

    Q: How does a potato conduct electricity?

    A: A potato has the potential to conduct electricity because it is a source filled with electrolytes. These electrolytes act as an electrical conductor which means they allow the flow of electric charges.
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  • How does electricity travel through wires?

    Q: How does electricity travel through wires?

    A: According to the Union University Department of Physics, when an electric current passes through a solid copper wire, the electrons move forward, but the protons within the positive atoms of copper do not. Electricity travelling through a wire moves at an extremely fast speed and is capable of powering anything from a light bulb to a laptop.
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  • How far can lightning travel in water?

    Q: How far can lightning travel in water?

    A: Generally, lightning can travel for 20 feet through water before dissipating. How far the charge travels depends on the intensity of the lightning, topography of the water, salinity and temperature. Lightning does not penetrate deep into water, but the charge disperses in all directions, favoring the surface.
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  • What is electric field intensity?

    Q: What is electric field intensity?

    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.
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  • What is a convection current?

    Q: What is a convection current?

    A: Convection currents occur in the Earth's geosphere, atmosphere and hydrosphere when heat is transferred from one place to another. Heat energy moves from hot places to cold places during convection.
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  • How do electric trains work?

    Q: How do electric trains work?

    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.
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  • How do fossil fuels make electricity?

    Q: How do fossil fuels make electricity?

    A: Power plants burn fossil fuels to heat water and make steam, which triggers complex generators inside the plant. These processes create an electromagnetic field that provides the electrical energy that people consume. A number of fossil fuels are used to make electricity, but the most common and inexpensive is coal.
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  • How did Albert Einstein change the world?

    Q: How did Albert Einstein change the world?

    A: Time magazine named Albert Einstein the "Person of the Century" for the 20th century. Given his achievements as a physicist, the epochal impact of his ideas and theories, and his courageous personal and political stands on important issues, it is easy to see why Einstein was a top contender.
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  • Why is wind energy important?

    Q: Why is wind energy important?

    A: Wind energy is important because it holds immense potential in supplying electricity across the world. Unlike other sources of electricity that require fuel in processing plants, wind energy generates electricity through wind, which is free. Wind is considered a native fuel that does not need to be transported or mined, eliminating two costly expenses from long-term energy expenses.
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  • What is the definition of hydroelectric power?

    Q: What is the definition of hydroelectric power?

    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.
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  • How far does light travel in one year at 3 x 108 m/s?

    Q: How far does light travel in one year at 3 x 108 m/s?

    A: According to Universe Today, light travels approximately 9.5 trillion kilometers or 5.9 trillion miles in a year. Light years are commonly referenced units, but astronomers tend to use a unit known as the parsec, equivalent roughly to 3.26 light years.
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  • How does a dynamo generator work?

    Q: How does a dynamo generator work?

    A: A dynamo generates electricity by using a magnetic field to imbue wires with an electric current. According to the Edison Tech Center, this process generates a direct current that can then be fed down the wires to an alternator for conversion to an alternating current; these alternators are sometimes known as generators.
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  • What is electric energy?

    Q: What is electric energy?

    A: Electric energy is the energy created by electrons moving through an electrical conductor. The world is made of matter. All matter contains atoms that contain electrons that are always moving. When electrons are forced down a conductive path, such as a wire, the movement produces electricity, or electric energy.
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  • What causes static electricity in the body?

    Q: What causes static electricity in the body?

    A: Static electricity occurs when the body builds up an imbalance of electrical charges. When an object moves against an insulating surface like carpet, weakly bound electrons can move from one surface to another, creating a charge. When that charged object touches a conductor, it releases the electrons, creating a spark.
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  • How do photovoltaic cells work?

    Q: How do photovoltaic cells work?

    A: When photovoltaic cells are hit by sunlight, photons are absorbed, electrons are released and capturing those free electrons causes an electric current. Photovoltaic cells create a direct current (DC), which must be transformed into an alternating current (AC) for industry and home use. Photovoltaic systems rely on an inverter to accomplish this conversion.
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