Battery Maintenance Checklist

Battery Maintenance Checklist

A maintenance routine is recommended in order to achieve maximum service life from batteries. Checklist to observe is as follows: 1. Ensure that all terminal lugs are clean and tight, to give good electrical contact. 2. Ensure that connecting straps and cables are of a suitable material and in good …

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Battery Specifications Explained | Parameters

battery specifications explained

In order to compare batteries, an electrician must first know what parameters (specifications) to consider. Terminal Voltage The most identifiable measure of a cell is the ‘terminal voltage’, which at first may seem too obvious to be so simple. In fact, the terminal voltage can change dramatically as a cell …

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Iron Losses in AC Generator

Iron Losses in AC Generators

An iron core onto which the coils are wound improves the voltage output by increasing the flux density, but causes two undesirable effects: eddy-current losses and hysteresis losses. Eddy-Current Losses Since iron is an electrical conductor, the rotation of an iron core within a magnetic field generates an EMF in …

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Electrical Phasor Diagrams

Electrical Phasor Diagrams

A vector is a line that, by its length and direction, represents the magnitude and angle of application of a force or velocity or other vector quantity. ‘Phasor’ is a term used to describe rotating vectors which appear in electrical calculations. Voltage and current phasors represent the RMS value of …

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Generation of an EMF in a Magnetic Field

Generation of an EMF in a Magnetic Field

Induced EMF Definition An EMF can be induced in a conductor if the conductor cuts across or is cut across by a magnetic field. That is to say,  when there is a relative movement between a conductor and a magnetic field, a current will be induced in the conductor if …

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Magnetic Hysteresis Loop including the B-H Curve

Magnetic Hysteresis Loop including the B-H Curve

Hysteresis Loop Definition A curve, or loop, plotted on B-H coordinates showing how the magnetization of a ferromagnetic material varies when subjected to a periodically reversing magnetic field, is known as Hysteresis Loop or Magnetization Curve. The term ‘hysteresis’ means to lag behind. In electrical terminology it is used to describe the lag …

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IOS App Development Course for Beginners

IOS App Development Course for Beginners | Online Free

This very comprehensive iOS App Development Course explores developing applications for iOS based devices such as iPhone, iPod Touch and iPad. This free online course will provide an overview of iOS development from use of current iOS SDK, to design of applications and industry business practices. Prior programming experience in …

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Importance of Electrical Grounding

Importance of Electrical Grounding

A fundamental safety principle of electrical installations is the protection of persons and livestock ‘against the danger that may arise from contact with exposed conductive parts which may become live under fault conditions. The principal method used is the automatic disconnection of the supply, of which the Earthing system is …

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Linux Tutorials for Beginners

Linux Tutorials for Beginners | Linux Online Course

This very comprehensive Linux online course covers the following tutorials for beginners: Introduction to Linux Operating System. Linux Installation, Basic Administration, Utilities And Commands, Upgrading, And Application Installation. Introduction to Scripting, Data Management, User Interfaces and Desktops, Essential System Services, Networking Fundamentals, Security And How They Function In Linux. Lesson …

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Electrolytic Corrosion

Electrolytic Corrosion Removal Protection

Electrolytic corrosion is created by contact between two different metals in a damp atmosphere with dust or pollution of a type that will dissolve in water. Precautions may have to be taken to ensure that the join between two different metals is kept dry. Dissimilar Metals The best-known effect of …

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Electrochemical Processes Explained

Electrochemical Processes

Electrochemical reaction, any process either caused or accompanied by the passage of an electric current and involving in most cases the transfer of electrons between two substances—one a solid and the other a liquid. Electrolysis Pure water is a very poor conductor of electricity, but if a small amount of an acid, alkali …

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