Electricity

A:

Electricity is defined as a type of energy that involves the flow of electrons, according to the Merriam-Webster dictionary. Electricity occurs when an atom gains or loses an electron.

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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 Role Does Friction Play in Static Electricity?

    Q: What Role Does Friction Play in Static Electricity?

    A: Static electricity is the build up and transfer of charges between insulators. Charges are built up in objects when they lose or gain electrons. To acquire a charge in static electricity, two neutral objects are rubbed together and the friction between the objects allows electrons to be transferred from one object to another.
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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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  • What Kinds of Devices Use Capacitors?

    Q: What Kinds of Devices Use Capacitors?

    A: Virtually every electronic device in widespread use contains some form of capacitor. Used to store electricity, capacitors often help computers avoid losing their memory when the batteries are being recharged. Other devices, such as amplifiers for car stereos, contain capacitors that store energy until it is needed by the amplifier. Motion detectors use capacitors to help achieve the proper timing of the unit’s circuits.
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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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  • 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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  • What Is a Voltmeter Used For?

    Q: What Is a Voltmeter Used For?

    A: A voltmeter is an instrument used to measure the voltage between two points in an electrical circuit. Some voltmeters register direct current while others measure alternating current.
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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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  • What Color Is Lightning?

    Q: What Color Is Lightning?

    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.
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  • Who Invented Neon Lights?

    Q: Who Invented Neon Lights?

    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.
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  • How Many Volts Are in a Lightning Bolt?

    Q: How Many Volts Are in a Lightning Bolt?

    A: According to the National Severe Storm Laboratory, a single lightning bolt can have 100 million to 1 billion volts, and it contains billions of watts, depending on whether it is positive lightning or negative lightning. Lightning strikes ground in the United States approximately 25 million times each year.
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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 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 Does an Electric Spark Occur?

    Q: How Does an Electric Spark Occur?

    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.
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  • What Was Benjamin Franklin's Kite Experiment?

    Q: What Was Benjamin Franklin's Kite Experiment?

    A: According to Code Check, Benjamin Franklin's famous kite experiment refers to an attempt by the renowned scientist, philosopher and politician to prove his theories about electricity. He took a simple kite out on a stormy day with his son and made the shocking discovery that lightning was related to the phenomenon of static electricity.
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  • What Is the Definition of Electricity?

    Q: What Is the Definition of Electricity?

    A: Electricity is defined as a type of energy that involves the flow of electrons, according to the Merriam-Webster dictionary. Electricity occurs when an atom gains or loses an electron.
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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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  • What Is the Function of a Lightning Rod?

    Q: What Is the Function of a Lightning Rod?

    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.
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  • What Are Some Real Life Examples of Series Circuits?

    Q: What Are Some Real Life Examples of Series Circuits?

    A: The most common series circuit in everyday life is the light switch. A series circuit is a loop that is completed with a switch connection sending electricity through the loop.
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  • What Are Basic Electronics?

    Q: What Are Basic Electronics?

    A: Basic electronics are capacitors, resistors, diodes, transistors, integrated circuits, potentiometers, LEDs, switches, batteries, breadboards and wire. Together, one can use these components to create a host of electronic devices by manipulating electricity.
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  • What Are the Advantages and Disadvantages of Electrical Energy?

    Q: What Are the Advantages and Disadvantages of Electrical Energy?

    A: Electrical energy comes from renewable and nonrenewable sources; it is generally inexpensive and readily available, but it leaves many appliances and heating units defunct when power supplies are interrupted. The benefits and drawbacks of electrical energy depend primarily on its source. Electricity created from fossil fuels is generally less expensive for consumers than electricity derived from renewable energy sources, such as solar and wind, but centralized forms of power can leave households and business offices disabled during severe weather.
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