What are Insulators?Insulators are the elements of transmission system which provide necessary insulation between line conductors and supports and hence, prevent any leakage current from the conductors to the earth.The line conductors in the overhead transmission lines should be supported on the poles or towers in such a way that ... Read More

The transmission voltage for which the cost of conductors, transformers, insulators, switchgears and other terminal apparatus is minimum is called the economical transmission voltage.As we know, if the transmission voltage is increased, the volume of conductor material required for the transmission lines is reduced. Hence, this decreases the expenditure on ... Read More

Underground Electric Transmission SystemThe system of electric power transmission uses underground cables for transmitting the electric power from the generating station to the consumers is known as underground electric transmission system.Underground cables have low visibility and are not affected by bad weather. However, the cost of these cables is comparatively ... Read More

AC (Alternating Current) and DC (Direct Current) are the two different types of electric current that are used in the welding process. AC arc welding is commonly used for down-hand heavy plate welds, fast fills and with aluminium TIG welding with high frequency, while DC welding is better for welding ... Read More

Resistance WeldingResistance welding is the process of joining of metals by applying mechanical pressure and by passing high electric current for a length of time through the metal area which is to be joined.The process of resistance welding was discovered by Professor Elihu Thompson in 1885 in Philadelphia. It was ... Read More

In the infrared or radiant heating, the heating elements are of tungsten filament lamps operating at about 2400 °C. As at this high temperature a greater portion of infrared radiation is given to the object for heating. In this method of heating, the heating effect on the object is greater ... Read More

What is Electric Heating?The process in which electrical energy is converted into heat by resisting the free flow of electric current is known as electric heating.Whenever an electric current is made to pass through any circuit having a resistance of R ohms, then power dissipated in the circuit is equal ... Read More

Electric ArcAn electric arc is an electric discharge of gases which is produced by passing an electric current between two points called electrodes. The electric arc was first detected by British chemist Humphry Davy in 1808. The electric arc is the visible plasma between two electrodes due to the ionization ... Read More

Carbon arc welding is used for welding copper and its alloys. In this method, the carbon electrode is used which is kept negative with respect to work if DC supply is used. It is because, if the carbon electrode is made positive, the carbon particles have a tendency to go ... Read More

Heating ElementThe device which converts electrical energy into heat energy through the process of Joule heating is known as heating element. The heating element is the part of any electric heating appliance in which the electrical energy transformed into heat. The electric current through the element encounters resistance which results ... Read More