Flash WeldingFlash welding, also called flash butt welding, is a resistance welding process, in which the ends of the workpieces are pressed together and a heavy electric current is passed through the joint during the welding process.In flash welding, the electrical current is applied to the workpieces before they are ... Read More

What is Electrolysis?The process of electrolysis can be defined in many ways −A technique that uses a direct electric current to stimulate a non-spontaneous chemical reaction is known as electrolysis.In other words, the process in which ionic substances are decomposed into simple substances by passing an electric current through them ... Read More

A low-pressure mercury vapor gas discharge lamp that uses fluorescence effect to produce visible light is known as fluorescent lamp or fluorescent tube.There are some common faults in case of the fluorescent lamps. These faults, their reasons and treatment methods are described in the following table −Type of FaultReasons of ... Read More

What is Butt Welding?Butt welding is one of the simplest and versatile resistance welding process. In the butt welding process, heat is produced by the contact resistance between two metal workpieces. The faces of the workpieces should be machined or edge prepared.The circuit diagram for butt welding process is shown ... Read More

The process of deposition of an oxide film on a metal surface is known as anodizing. The anodizing is an electrolytic passivation process, mainly used to increase the thickness of the natural oxide layer on the surface of the metal.This process is called anodizing because the metal part to be ... Read More

An electric light bulb or lamp that produces light by heating a filament wire to a high temperature until it glows is known as incandescent bulb. The incandescent bulb was invented by an American inventor, named Thomas Alva Edison.The incandescent bulb is an electric lamp that works on the principle ... Read More

An electric heating appliance that is used to heat up water is known as electric water heater. The electric water heater brings cold water in through the dip tube and heats this water using the heat produced by an electric heating element and the heated water taken out through outlet ... Read More

A sodium vapor lamp is type of gas-discharge lamp that uses sodium (Na) in an exciting condition to produce light of thick blue color. The first sodium vapor lamp was commercially designed by Philips in 1932 in Holland.Circuit Diagram of Sodium Vapor LampThe circuit diagram and the construction of a ... Read More

A gas discharge lamp that uses an electric arc through the vaporized mercury to produce light is known as mercury vapor lamp. The operation of the mercury vapor lamp is based on the excitation of atom of some gaseous medium. Also, the frequency and the wavelength of the radiation given ... Read More

A halogen lamp or tungsten halogen lamp is an incandescent lamp. The halogen lamp consists of a tungsten filament enclosed in an environment of an inert gas like argon and a small amount of a halogen like bromine or iodine. The combination of the tungsten filament and the halogen results ... Read More