Power and Watt’s Law

Watt Law

When there is current through a resistance, electrical energy is converted to heat or other forms of energy such as light. A common example of this is the incandescent light bulb that becomes too hot to touch when it has been on for a short time. The current through the …

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Resistance and Ohm’s Law

Cutaway View of a Carbon-Composition Resistor

With the exception of a special class of materials called superconductors, all materials have resistance, which is the opposition to current. Conductors are generally metallic materials with low resistance, whereas insulators are materials with high resistance. When there is current through a resistive material, heat is produced by the collisions …

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Electrical Current: Definition & Formula

Complete DC Circuit

The original idea of current was based on Benjamin Franklin’s belief that electricity was an unseen substance that moved from positive to negative. Conventional current is defined based on this original assumption of positive to negative. The original definition is widely used, although there is another definition of current called electron flow. Electrons move …

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Nuclear Energy Environmental Impact

The ITER Tokamak Fusion Reactor

Environmental Concerns The environmental concerns associated with nuclear reactors are very different than with fossil fuel–burning power plants. On the positive side, reactors do not emit greenhouse gases or other atmospheric pollutants. They also use significantly less fuel in terms of weight than coal-fired plants. Reactors for electricity production have …

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How Does Nuclear Energy Work

Diagram of a Pressurized Water Reactor

Nuclear Energy Nuclear energy derives its power from the enormous amount of stored binding energy in the nucleus of the atom, which is the energy that holds the nucleus of the atom together. By tapping this energy, a substance such as water is heated and converted to steam to drive …

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Environmental Impact of Fossil Fuels

The environmental effects of using fossil fuels can have a serious impact on the quality of life. The process of burning fossil fuels combines carbon in the fuel with oxygen in the air to form carbon dioxide (CO2) that is released to the atmosphere. This is true for all fossil …

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Types of Fossil Fuels

renewable energy sources in the united states

Fossil fuels are fuels formed from decaying plant and animal matter that was primarily formed over millions of years. Fossil fuels include coal, oil (petroleum), and natural gas. These fuels have been the primary energy source for over 200 years, but they will eventually have to be replaced by other sources …

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Transformer Ratios of Single-Phase Transformers

Figure 4. Diagram using standard electrical symbols to show the AC supply, a single-phase transformer, and its connected load in an electrical schematic

In a given single-phase AC transformer, whether auto, isolation, or current type, there are three principle transformer ratios: the current ratio, the turns ratio, and the voltage ratio. The ratios of both current and voltage are dependent on the turns ratio, which is established at the point of manufacture (by …

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Electric Motor Load

As shown in Figure 1, the installations and uses of electric motors are just as diversified as the many different kinds and horsepower ratings of electric motors. In general, electric motors or electrical utilization equipment that contains motor loads must be provided with a disconnecting means, supply conductors, and some …

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Scientific Notation Rules and Examples

scientific notation

The goal of this module is to provide students with the tools they need to use scientific notation to represent quantities, apply electrical units of measure, convert metric units, and express measured data with the proper number of significant figures. Objective A learner will be able to: Use scientific notation …

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Secure Data Transport in the Cloud

Secure Data Transport in the Cloud

On the Internet, the primary protection mechanism is encryption. Cloud providers use encryption such as Advanced Encryption Standards (AES) and Triple Data Encryption Standards (3DES) to ensure a standard of security in their environments. Encryption is often used with identity management. To avoid exposure to a user’s identity and to …

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Key Technical Considerations for Cloud Deployments

INTRODUCTION In this lesson, different cloud types will be compared to identify which type is best suited to meet an organization’s business needs. Technical details of new and/or previously discussed cloud components and features will also be explained.  Cloud service providers will often adopt technical standards to ensure its customer …

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Electrical Engineering Terms A

ABB Drive Assistant For ABB Drives, particularly the ACS355 Series, the Drive Assistant provides a convenient method to program and control the ABB Drive and electric motors. There are two version, the Basic with a one-line display and the Advanced with a three line display. Amortisseur Winding. In an AC …

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