Deepakkumar Yadav
Mercury Vapour Lamp : Q. Explain with neat sketch construction and working of high pressure mercury vapour lamp. Principle : “When mercury discharge under low pressure gives mainly ultraviolet radiations. If pressure is increased to one or two atmospheres, its proportion of radiations in visible spectrum is increased and we get light having bluish tinge”. Construction … Read more
Flame – Arc Lamp : Working principle : Two carbon rods kept face to face touching to each other connected to the source of electricity and if they are departed from each other to form a small air gap between them, an arc is produced with tremendous heat and a light is produced. The principle … Read more
A.C. carbon arc lamp : Working principle : Two carbon rods kept face to face touching to each other connected to the source of electricity and if they are departed from each other to form a small air gap between them, an arc is produced with tremendous heat and a light is produced. Construction and … Read more
Carbon Arc Lamps : Working principle : Two carbon rods kept face to face touching to each other connected to the source of electricity and if they are departed from each other to form a small air gap between them, an arc is produced with tremendous heat and a light is produced. (a) D.C. carbon … Read more
Gas Filled Incandescent Lamp : Construction : Construction is same as vacuum lamps. Working : A metal filament can work in an evacuated bulb upto 2,000°C without oxidation and if it is worked beyond this temperature it vaporizes quickly and blackens the lamp. For higher efficiency it is necessary to use … Read more
Types of Lamps : There are various types of lamps used in lighting (illumination system). The lamps can be listed as below :(1) Incandescent lamp : (a) Vacuum lamps (Filament lamp) (b) Gas filled incandescent lamp (2) Arc lamps : (a) D.C. Carbon arc lamp. (b) A.C. carbon … Read more
Incandescent Lamp (a) Vacuum Lamps / Filament Lamps : These lamps can operate upto the temperature of 2000°C. The construction is shown in the Figure (A) The filaments used for this type of lamp are carbon, osmium, tantalum or tungsten. Tungsten is best of all. The filament materials have the properties: High melting point. Low … Read more