Electricity

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.

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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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  • How Can I Make Static Electricity?

    Q: How Can I Make Static Electricity?

    A: There are many ways to make static electricity. To create a small amount of static electricity a person can develop a static charge by rubbing a glass rod with a silk cloth or amber against wool. The static charge will allow the glass and the amber to attract small amounts of paper and plastic.
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  • Does Lightning Come From the Ground?

    Q: Does Lightning Come From the Ground?

    A: Lightning originates in the sky, but the part of the cloud-to-ground lightning visible to the human eye comes from the positive electrical charge that responds to the invisible negative electrical charge sent from the clouds. Lightning helps the ground and the atmosphere exchange and balance positive and negative energy.
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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 Origin of Solar Energy?

    Q: What Is the Origin of Solar Energy?

    A: Solar energy comes from the sun, but the energy the sun emits comes from nuclear fusion on a massive scale. Specifically, it is the fusion of two hydrogen atoms into a single atom of helium.
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  • Does Lemon Juice Conduct Electricity?

    Q: Does Lemon Juice Conduct Electricity?

    A: According to the California Science Center, lemon juice can both conduct and produce electricity. Lemon juice contains citric acid, which is a strong electrolyte. The electrolytes in lemon produce electricity by allowing two metals to react with each other.
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  • Who Discovered Solar Energy?

    Q: Who Discovered Solar Energy?

    A: Physicist Alexandre Edmond Becquerel, of Paris, France, discovered solar power in 1839. Energy Matters reports that Becquerel demonstrated the use of solar energy by shining sunlight onto an electrode submerged in a conductive solution to generate an electric current. This was known as the photovoltaic effect.
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  • Where Does Hydropower Come From?

    Q: Where Does Hydropower Come From?

    A: Hydropower, also known as hydro-electric power, is generated by hydro-electric dams placed on many of the world's major rivers. These structures divert the flow of the river and harness the force of the water to turn massive turbines that power electricity generators.
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  • What Is the Electromagnetic Theory?

    Q: What Is the Electromagnetic Theory?

    A: The electromagnetic theory is a united theory of electromagnetism established by James Clerk Maxwell. This theory primarily discusses the relationships between electric field and magnetic field based from previous observations and experiments related to electricity, magnetism and optics combined.
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  • How Are Conductors and Insulators Alike?

    Q: How Are Conductors and Insulators Alike?

    A: Conductors are materials that allow the flow of electric current, whereas insulators do not. While conductors and insulators are different in that respect, their similarity is in their makeup of atoms. It is these atoms that either have room to float around to facilitate conduction or have little freedom to move around; this lack of freedom makes the material they form an insulator.
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  • What Does Non-Renewable Energy Mean ?

    Q: What Does Non-Renewable Energy Mean ?

    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.
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  • How Does Softball Relate to Physics?

    Q: How Does Softball Relate to Physics?

    A: According to the University of Sydney, softball is related to physics through hitting and pitching. The University notes that many players are aware of certain physics-related phenomena in softball but do not know much about the physics-related concepts they are using in almost every game.
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  • What Happens to the Air When the Electrical Energy of Lightning Is Discharged?

    Q: What Happens to the Air When the Electrical Energy of Lightning Is Discharged?

    A: Surrounding air superheats to more than 18,000 degrees Fahrenheit, expands outward rapidly and produces the strong soundwaves known as thunder when the electrical energy of lightning is discharged in Earth's atmosphere. Most of the energy of lightning is in the form of heat that quickly dissipates in cooler air. Before lightning strikes, the insulating capacity of air breaks down, and the negatively charged atmosphere produces powerful bolts.
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  • What Are Isaac Newton's Scientific Achievements?

    Q: What Are Isaac Newton's Scientific Achievements?

    A: Isaac Newton’s scientific achievements include his three laws of motion — inertia, acceleration, and action and reaction the law of universal gravitation, the reflecting telescope and the theory of calculus. Newton published important written works, the most famous of which is “Principia Mathematica,” where he described elliptical orbits, forces in motion, fluids and mechanics.
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  • What Is Electromagnetic Radiation?

    Q: What Is Electromagnetic Radiation?

    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.
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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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  • How Much Power Does an Elevator Use?

    Q: How Much Power Does an Elevator Use?

    A: In order to rise, an elevator must expend at least enough energy to lift itself and its occupants to the desired height against the downward pull of gravity. Most elevator systems consume approximately 5 percent of a building's energy budget, according to the American Council of Energy Efficient Economy
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  • How Does a Laser Diode Work?

    Q: How Does a Laser Diode Work?

    A: A laser diode works by having a p-n junction that is powered by the injection of electric current. The active medium for these lasers is a semiconductor similar to what is found in light-emitting diodes.
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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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  • 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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  • Where Is Nuclear Energy Used?

    Q: Where Is Nuclear Energy Used?

    A: Nuclear energy is mostly used for electric power generation. According to the World Nuclear Association, there were over 430 commercial nuclear power reactors operating in 31 countries as of April 2014, with over 370,000 MW of total capacity. Approximately 70 more reactors were under construction as of April 2014.
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