Basic Electrical Engineering
Electrical Engineering
Electrical Circuit Analysis
Electrical Engineering
Introduction to Computer
Electrical Engineering
Calculus and Analytical Geometry
Electrical Engineering

Using Computers Outside of the IT Industry

Few hardwood products manufacturers can boast an ecommerce-enabled Web site where customers view catalogs, place orders, track orders, and review their account history 24 hours a day, seven days a week. Even fewer can offer customers a solution that uses computer modeling and simulation techniques to recreate 'real world” projects in a virtual environment. Thanks to the efforts of Richard Enriquez, Enkeboll Designs of Carson, California, can boast that and more in an industry where manufacturing and related processes remain largely manual and labor-intensive. "No one else offers ecommerce capabilities in our category" said Richard Enriquez, director of marketing, who envisions a time when the firm's

Computer Software

The ingredient that enables a computer to perform a specific task is software, which consists of instructions. A set of instructions that drive a computer to perform specific tasks is called a program. These instructions tell the machine's physical components what to do; without the instructions, a computer could not do anything at all. When a computer uses a particular program, it is said to be running or executing that program. Software Brings the Machine to Life Although the array of available programs is vast and varied, most software falls into two major categories: system software and application software.

Computer Storage Devices

A computer can function with only processing, memory, input, and output devices. To be really useful, however; a computer also needs a place to keep program files and related data when they are not in use. The purpose of storage is to hold data permanently, even when the computer is turned off. Primary storage, also known as main storage or memory, is the main area in a computer in which data is stored for quick access by the computer's processor. On today‘s smaller computers, especially personal computers and workstations, the term random access memory (RAM) - or just memory is used instead of primary or main

Computer Input and Output Devices

A personal computer would be useless if you could not interact with it because the machine could not receive instructions or deliver the results of its work. Input devices accept data and instructions from the user or from another computer system (such as a computer on the Internet). Output devices return processed data to the user or to another computer system. Computer Input Devices The most common input device is the keyboard, which accepts letters, numbers, and commands from the user. Another important type of input device is the mouse, which lets you select options from on-screen menus. You use a mouse by moving it across a flat

Computer Memory Devices

In a computer, memory is one or more sets of chips that store data and/or program instructions, either temporarily or permanently. Memory is a critical processing component in any computer. Personal computers use several different types of memory, but the two most important are called random access memory (RAM) and read-only memory (ROM). These two types of memory work in very different ways and perform distinct functions. Random Access Memory The most common type of memory is called random access memory (RAM). As a result, the term memory is typically used to mean RAM. RAM is like an electronic scratch pad inside the computer. RAM holds

Branches of Electrical Engineering

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US, Pakistan, UAE
Electrical Engineering and Telecommunications is arguably the origin of most high technology as we know it today. Based on fundamental principles from mathematics and physics, electrical engineering covers but not limited to the following fields:

Ohms Law for Magnetic Circuits

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Philippines, Nigeria, Turkey
Recalling the equation introduced for Ohm's law for electric circuits. $$ \text{Effect} = {\text{cause} \over \text{opposition}} $$ The same equation can be applied for magnetic circuits. For magnetic circuits, the effect desired is the flux $\Phi$. The cause is the magnetomotive force (mmf) , which is the external force (or "pressure") required to set up the magnetic flux lines within the magnetic material. The opposition to the setting up of the flux $\Phi$ is the reluctance $S$. Substituting, we have $$\bbox[10px,border:1px solid grey]{\Phi = {m.m.f \over S}} \tag{1}$$ The magnetomotive force is proportional to the product of the number of turns around the core

Frequency Response of the RC Circuit

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US, Pakistan, Australia
Thus far, the analysis of series circuits has been limited to a particular frequency. We will now examine the effect of frequency on the response of an R-C series configuration such as that in Fig. 1. The magnitude of the source is fixed at 10 V, but the frequency range of analysis will extend from zero to 20 kHz. Let us first determine how the impedance of the circuit $Z_T$ will vary with frequency for the specified frequency range of interest. Before getting into specifics, however, let us first develop a sense for what we should expect by noting the impedance-versus-frequency curve of each element, as drawn in Fig.


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US, Nigeria, Australia
Chapter 11 discussed the self-inductance of a coil. We shall now examine the mutual inductance that exists between coils of the same or different dimensions. Mutual inductance is a phenomenon basic to the operation of the transformer, an electrical device used today in almost every field of electrical engineering. This device plays an integral part in power distribution systems and can be found in many electronic circuits and measuring instruments. In this chapter, we will discuss three of the basic applications of a transformer: to build up or step down the voltage or current, to act as an impedance matching device, and to isolate

Mutual Inductance

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Canada, Pakistan, France
A transformer is constructed of two coils placed so that the changing flux developed by one will link the other, as shown in Fig. 1. This will result in an induced voltage across each coil. To distinguish between the coils, we will apply the transformer convention that the coil to which the source is applied is called the primary, and the coil to which the load is applied is called the secondary. For the primary of the transformer of Fig. 1, an application of Faraday's law will result in $$ \bbox[10px,border:1px solid grey]{e_p = N_p { d \phi \over dt}} \,\, \text{(volts, V)} \tag{1}$$ revealing