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why is iodine sometimes introduced into atungsten lamp.in addis ababa university.
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If the tungsten filament of a lamp has a cross-sectional are of 5x10-9 m2 how long must it be have a resistance of 120 ohms at 20 degrees Celsius?
If the tungsten filament of a lamp has a cross-sectional area of 5x10-9m2,how long must it be to have a resistance of 120 ohms at 20 degree celsius?
What test could you do on an iodine crystal to comfirm thst iodine is a non metal?
Make a simple circuit, with a battery, bulb, connect it to the crystal and if the lamp doesnt light up it isn't a metal :D
If a heat lamp were introduced into the room at position B on the Ideal map what changes would occur in the isotherm values?
The temperature of the isotherms will increase
Does ohm's law also apply to the filament lamp?
No. For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage. This simply doesn't happen with a tungsten filament. In fact, MOST materials don't obey Ohm's Law.
Is sodium lamp a monochromatic lamp?
LPS is a monochromatic lamp and HPS is not.
Difference between tungsten lamps and carbon lamps?
tungsten lamp has got inert gas argonsometimes iodine is added to improve intensity carbon filament produces less light than tungsten lamp but it radiates much less energy in the form of heat waves
What is lamp types?
There are two types of lamps the tungsten halogen lamps and incandescent lamps. Tungsten Halogen Lamps are similar to incandescent lamps and produce light in the same manner from a tungsten filament; however the bulb contains a halogen gas (bromine or iodine) which is active in controlling tungsten evaporation, whereas the incandescent lamp suppresses tungsten evaporation.
What material is used for fillament in tungsten lamp?
tungsten
Which material is used for for filament in tungsten lamp?
i believe it is cadnium.
Why the lamp lights up?
Incandescence of a finely coiled tungsten wire.
What is the nature of the slope of the voltage-resistance characteristics for the carbon lamp?
for Tungsten lamp the slope of the curve is positive where for carbon it is negative
What is the purpose of halogen gas in a tungsten-halogen lamp?
because somebody didn't answer
What is used to make globe filaments?
The first successful light bulb filaments were made of carbon (from carbonized paper or bamboo). In 1902 the Siemens company developed a tantalum lamp filament. From 1898 to around 1905 osmium was also used as a lamp filament. In 1906 the tungsten filament was introduced
Why are V-i characterstics different for tungsten and carbon lamp?
As carbon filament bulbs have a negative temperature coefficient and tungsten filament light bulbs have a positive temperature coefficient.
What are you hearing when you shake a light bulb?
The piece of coiled wire made of Tungsten (Wolfram) that heats up and glows in the lamp.
Why do the lamp light up?
The purpose of a lamp is to light up a small area.
Which elements is used in light bulbs as a filament?
Tungsten ( chemical name Wolfram ) is used for the filament of an incandescent lamp. This is due to ability for making fine guage Tungsten wires , mechanical strength of such wires and the High melting point , which is considerably more than the normal operating temperature of the filament.
