How Does Static Electricity Work?

How Does Static Electricity Work? | Examples | Uses

Static electricity is the accumulation of electric charges on the surface of a material, usually an insulator or nonconductor of electricity. The term static means standing still or at rest, and static electricity refers to an electric charge at rest. The result of this buildup of static electricity is that objects may …

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LAN, WAN, and the Internet Explained

LAN, WAN, and the Internet Explained

Computers can be connected, or networked, to one another through cable or wireless technologies, enabling communications and data and resource sharing. A network can be limited to a single building, or spread across the entire globe. Local Area Network (LAN) A local area network (LAN) is a group of computers …

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Laser Construction, Types & Applications

Laser Construction, Types & Applications

The word laser is an acronym for light amplification by stimulated emission of radiation. Laser light is different from other forms of light because light produced by a laser is in phase. To understand what it means for light to be in phase, look at the following figure. Figure. Visible …

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Digital Electronics Flip Flops | Types | Truth Table

Digital Electronics Flip Flops | Types |Truth Table

Flip-flops are a rather unique digital device based upon the operation of combined logic gates. Flip-flops are an essential part of digital electronics. They are at the very heart of counters, timers, sequencing devices, and memories. Flip-flops are semiconductor devices that are capable of assuming one of two stable states. …

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Digital Circuits Applications

Digital Circuits Applications

Digital circuits are used for many reasons. For example, digital circuits convert ac sine waves to digital pulses, Figure 1. The ac signal is sampled. Various points are given digital values. These are later converted to a binary value. Figure 1. An ac signal being converted to digital pulses. Figure …

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How Does Vacuum Tube Work | Working Principle

How Does Vacuum Tube Work | Working Principle

The vacuum tube is a direct result of Thomas Edison’s experiment with the incandescent lamp. In this experiment, a metal plate was placed in the vacuum bulb containing the filament. A battery and series meter were connected between the light filament and the plate. At this point, Edison discovered that …

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Electric Motor | Protection | Failure | Troubleshooting

Electric Motor | Protection | Failure | Troubleshooting

Motor protection is important to any motor system. Most motor protection involves safety devices installed in the power lines that feed the motor. These devices protect more than just the motor. They protect the load and any other device connected in the motor system. Motor Installation and Protection Unless the …

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Transformer Applications and Uses

Transformer Applications and Uses

There are quite a number of special transformer applications. The following text details only a few of these applications. Autotransformers The common transformer consists of two windings: primary and secondary. While the two windings are not physically joined, a magnetic coupling exists between them. The electrical separation between the windings …

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DC Motor Theory

DC Motor Theory | Working Principle

One of the most important developments in the field of electricity is the electric motor. The electric motor converts electrical power into rotating mechanical power. Motors are used for such items as refrigeration and air conditioning, food mixers, vacuum cleaners, grinders, pumps, power bench saws, lathes, various wood and metal …

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Paralleling of Generators and Synchronization

Paralleling of Generators and Synchronization

The most common generator used in production of electrical power is the three-phase generator. It consists of a rotating magnetic field inside three sets of windings. See Figure 1, part A. The three sets of windings are referred to as the armature of the generator. The armature provides power for …

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DC Generator Types & Working

dc generator types and working

There are a number of different types of DC generators. Several of these generator types will be discussed briefly. Study their similarities as well as their differences. DC Generators can be distinguished by their method of excitation. Self-excited generators can be separated further into the categories of shunt, series, and …

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Electric Generator: Construction, Working and Losses

three phase electric generator construction and working

After studying this article, you will be able to: Explain how mechanical energy can produce electrical energy. State Lenz’s law. Discuss the difference between direct current and alternating current. Explain the construction and function of an Electric generator. In 1831, scientist Michael Faraday wondered: If electricity produces magnetism, can magnetism …

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Electrical Components and Symbols

Electrical Components and Symbols

Electrical and electronic systems contain circuits. Loosely defined, a Circuit is a group of components that performs a specific function. The function performed by a given circuit depends on the components used and how they are connected together. Nearly all circuits, no matter how complex, are made up of the …

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Use your iPhone as Your Home Stereo

Use your iPhone as Your Home Stereo

Your iPhone is great for music on the go, but you can use it as your home stereo as well. In this project, we’ll look at the five best ways of doing so: •   Using an iPhone speaker dock •   Connecting your iPhone directly to your stereo with a cable •   Connecting your …

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Load your iPhone with Content from Multiple Computers

Load your iPhone with Content from Multiple Computers

As you know, you can sync your iPhone in either of two ways: by using Apple’s iCloud online service, or by using your computer. iCloud is arguably the wave of the future, and it’s a great way to keep your music and other content synced among your iPhone, your computer, …

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Resistor Types and Color Code

Resistor Types and Color Code

One of the most common components encountered in the study of electronics is the resistor. The resistor is used to create desirable voltage drops and limit current values in electronic circuitry. Figure 1 shows several molded composition, fixed resistors. They are manufactured in many sizes and shapes. The schematic symbol …

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Electrical Circuit Devices

Electrical Circuit Devices

There are several common circuit devices that are present in most electrical and electronic circuits. They provide a means of controlling electron flow through the conductor paths and provide for safe operation of circuits. The three important items discussed here are switches, connectors, and circuit protection devices. Switches Switches are …

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