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Because tungsten has a high melting point. This allows it to be heated red/white hot without melting. This high temperature results in the thermionic emission (boiling off) of electrons which are needed for the CRT to work.
Tungsten also has a low vapour pressure at high temperatures, so it won't evaporate too quickly, and it is relatively cheap.
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What is the name of the wire in a light bulb?
Filament. Correct; made of tungsten wire in most incandescent bulbs.
What is the part of the light bulb that glows?
In an incandescent lamp, it is called a filament. It is usually made out of Tungsten. The resistance in the filament causes it to heat up, and then glow. In a neon lamp it is plasma, which is an ionized gas. In a fluorescent bulb mercury vapor is ionized to produce UV radiation, that hits the phosphor coating on the outside of the bulb and that glows.
What is a TRIODE and what are its uses?
A triode is a vacuum-tube (US) aka valve(UK) with three electrodes : an anode, a cathode and a grid. The cathode is heated electrically which boils off a cloud of electrons. The anode is made positive ( typ. 100-500V) which attracts the electrons towards it. The grid is an open structure, usually of thin wires, placed between the anode and cathode, but nearer the cathode. If a negative voltage is applied to the grid the current flow through the tube is reduced. The more negative, the less current. Prior to the development of transistors, tubes were used for all things in radio,TV and electronics. Different tubes had different numbers of electrodes; the triode was particularly suited to high power amplifiers, especially at radio frequencies. Triodes are still used today by shortwave radio stations, and for RF heating equipment.
Element of electric heaters and filament lamp are made of high resistivity materials this is done to the filament length?
Not too sure bout it babe. Wish I knew the answer. Will get back to you if I do, yea mate?
What particle was found using a cathode ray tube?
British scientist Sir Joseph J. Thomson discovered in 1897 that cathode rays were made up of what are now known as electrons.
How tungsten filament made?
Tungsten filament is used in the creation of the light bulb. It can be made in different shapes like coiling, and horizontal or vertical helix.
What is metal with which the filament is made?
Assuming you're talking about light bulbs... the filament is made from Tungsten.
Sentence with filament?
Filament was made from plastic. The filament was very stable and smooth.
What is made up of tungsten?
For starters, the filament in a lightbulb
What is filament in a bulb?
The filament is the small coil that glows when the bulb is on. I believe its made out of tungsten
What makes up the filament of light bulbs?
Filament of light bulbs are made up of Tungsten.
What is now days light bulb filament made out of?
tungsten
What is the filament of an X-ray tube made of?
Rhodium OR Tungsten or Molybdenum ...............................................GHo$t
When were filament tubes invented?
The first hot filament diode tube was invented in 1904 by Fleming, the first hot filament triode tube was invented in 1907 by DeForest. However it was not until 1913 that it was determined that high vacuum was actually needed for efficient and reliable operation of these tubes. So true hot filament vacuum tubes were not made and used until 1913.
Which element is used to make the filament of electric bulbs?
They're made of Tungsten.
What is the metal of a light bulb made of?
The wire inside of an electrical light bulb is called a "filament". The word filament comes from the Latin word "filum" which means "thread". In various fields there are many different types of filaments with different uses, however the ones inside of light bulbs are made out of tungsten and work by super-heating by passing electricity through it.
Which element is used in light bulbs as the filament?
Generally, tungsten.
