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Articles by Manish Kumar Saini
Page 59 of 80
What is Seam Welding? – Working and Applications
Seam WeldingThe welding process in which two similar or dissimilar materials are joined at the seam by the application of heat generated from electrical resistance is known as seam welding. The seam welding is a types of resistance welding, in which weld is produced by roller electrodes instead of tipped electrodes.Most seam welding processes produce a continuous or intermittent seam weld near the edge of two overlapped metals by using two machine driven roller electrodes. As in the seam welding process, the roller electrodes move over the metal workpieces, the workpieces are under pressure and the current passing through them ...
Read MoreWhat is Polar Curve in Illumination?
Polar CurvesThe plots drawn between the candle power and angular position are known as polar curves. Due to unsymmetrical shape of the lamps, the luminous intensity is not uniform in all directions. The luminous intensity in all directions can be represented with the help of polar curves.The polar curves are drawn by taking the luminous intensities in various directions at an equal angular displacement in the sphere. A radial ordinate pointing in any particular direction on a polar curve represents the luminous intensity of the source when it is viewed from the direction.Therefore, the polar curves are classified into two ...
Read MoreWhat is Laser Beam Welding? – Process, Advantages, Disadvantages and Applications
Laser Beam Welding (LBW) is a fusion welding process in which multiple pieces of metal are joined together through the use of laser. In LBW, the laser beam acts as a concentrated source of heat, which allows narrow, deep welds and high welding rates. The laser beam welding process is frequently used in high volume applications, such as in the automotive industry.Laser Beam Welding ProcessThe figure shows the schematic diagram of the laser beam welding (LBW).The main parts of the set up used for the laser beam welding are as follows −Laser Machine – It is the machine that is ...
Read MoreWhat is Lambert's Cosine Law? (Laws of Illumination)
The light received by any surface depends upon the angle made by the normal to the surface, to the light flux. The Lambert's cosine law of illumination explains the relation between the illumination of the surface and the cosine of the angle.StatementThe Lambert's cosine law of illumination states that"The illumination of a surface is directly proportional to the cosine of the angle between the normal to the surface and the direction of incident light".That is, $$\mathrm{\mathit{E}\propto cos\, \theta \: \: \: \cdot \cdot \cdot \left ( 1 \right )}$$ExplanationCase I – Consider a surface that is normal to the luminous ...
Read MoreWhat is Flash Welding? – Parts, Process, Advantages, Disadvantages and Applications
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 brought together so that when they meet arcing (or flashing) takes place.Parts of Flash WeldingThe main parts of the flash welding process are described below −Power Supply – An AC power supply is used to provide power for the flash welding or flash butt welding.Welding Transformer – A welding transformer ...
Read MoreWhat is Electrolysis? – Definition, Principle, and Process
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 is known as electrolysis.Or, electrolysis is the process based on the fact that electrical energy can produce chemical changes, i.e., it can cause a chemical reaction to happen.Principle of ElectrolysisThe principle of electrolysis is based on the term "Electrolyte". An electrolyte is a substance containing free ions that make the ...
Read MoreCommon Faults and Treatment Methods of Fluorescent Lamp
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 FaultTreatment or Repairing MethodsThe fluorescent lamp does not start.Loose and defective holders.Defective fluorescent tube.Defective starter switch.Defective choke.Turn the tube through 90° and check the connections and holders.Replace the tube.Try another starter switch / replace the starter switch.Replace the choke.Fluorescent lamp blinking ON and OFFLoose contacts.Wrong circuit connections.Low supply voltageDefective starter.Defective ...
Read MoreWhat is Anodizing? – Requirements, Process, Advantages & Applications
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 treated forms the anode electrode of the electric circuit of the process. The anodizing increases the corrosion resistance and wear resistance and provides better adhesion for paint primers and glues as compared to the bare metal.Requirements of AnodizingThe anodizing of metals is used for the following requirements −To provide the ...
Read MoreWhat is an Incandescent Lamp? – Construction, Working and Applications
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 of incandescence that means it emits light by the heating of a filament. The incandescent lamps come in different sizes with different voltages and wattages.Construction of Incandescent LampThe construction and the parts of an incandescent lamp is shown in the figure below.The most important part of the incandescent lamp is ...
Read MoreTypes of Electric Water Heater (Plate Heater, Immersion Water Heater, Geyser)
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 pipes.Electric water heaters are classified into three types viz. −Normal Plate HeaterImmersion HeaterGeyser Water HeaterLet's check each of these types of water heaters in detail.Normal Plate HeaterThe normal plate water heater is the simplest types of water heater. It consists of two round shaped plates made up of nickel. These ...
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