Electricity

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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  • What is eddy current?

    Q: What is eddy current?

    A: An eddy current is an electrical current induced in a piece of metal due to the relative motion of a nearby magnet. Any time a magnet passes a metallic object, its magnetic field induces an electric current, which swirls around near the surface of the metal like an eddy in a river. This electric current creates its own magnetic field, which opposes the motion of the magnet.
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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 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 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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  • 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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  • What generates electricity

    Q: What generates electricity

    A: While there are many different methods of generating electricity, most electricity that powers homes and businesses comes from electric turbines. These devices spin a magnetic core through copper wiring, creating a charge through magnetic induction. In many cases, the energy to turn the turbine comes from steam generated by coal, natural gas or nuclear fission. In more sustainable cases, moving water or wind turns the turbine and generates electricity.
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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 some good things about nuclear energy?

    Q: What are some good things about nuclear energy?

    A: According to the International Atomic Energy Agency, nuclear energy offers the capability to generate extremely large amounts of electricity without producing greenhouse gases or other air pollutants. Like fossil fuel technologies, nuclear power plants can scale their output to meet demand, and they are extremely fuel-efficient. A single kilogram of uranium can produce up to 3.5 million kilowatt-hours of electricity, where a kilogram of coal produces around 3 kilowatt-hours.
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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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  • 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 are the advantages and disadvantages of solar energy?

    Q: What are the advantages and disadvantages of solar energy?

    A: There are a number of advantages, such as its renewable nature, and disadvantages, such as the high initial cost, that are worth consideration when it comes to solar power. The overall benefits of using solar energy over other sources of energy, such as the oil, are high, including the fact that it is friendly to the environment.
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  • How is wind power made?

    Q: How is wind power made?

    A: Wind power harnesses the movement of the wind to turn electrical turbines, generating power. Large windmill-like turbines with canted blades catch the wind, rotating around a central axle. This axle connects to the central rotor of an electric turbine. As the turbine spins, the interaction of copper wires and magnets creates an electrical current.
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  • How is it possible to power a light bulb with a potato?

    Q: How is it possible to power a light bulb with a potato?

    A: A potato helps power a light bulb by acting as both a bridge and a separator for two electrodes made of different metals. The two metals most frequently used are zinc and copper because of their ubiquity and difference in electron affinity. The acid in the potato starts the reaction, and the electrolytes in the potato allow a flow of electrons, an electric current, to flow between the electrodes.
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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 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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  • Can you get struck by lightning through a window?

    Q: Can you get struck by lightning through a window?

    A: Lightning can strike items and people through windows. As a result, the National Weather Service advises people to stay away from windows during lightning storms.
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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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  • Where does electricity come from?

    Q: Where does electricity come from?

    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.
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  • How does an electrical transformer work?

    Q: How does an electrical transformer work?

    A: Transformers have two sets of wires wound around an iron core, and they use electromagnetic induction to increase or decrease electrical current. The primary wires magnetize the iron after the application of current, and the secondary wires use the magnetic induction to create an output current. The increase or decrease of output current depends on how many times the input and output wires wind around the core.
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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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