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They're made of Tungsten.
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∙ 12y ago
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What elements make a light bulb possible?
For an element to be eligible for a light bulb, it should be highly malleable and should have a very high melting point. Tungsten is one such element which is extensively used to make filaments of electric bulbs.
Can you use a copper wire to make a filament of an electric bulb?
No, copper wire cannot be used to make the filament of an electric bulb as copper wire has very low resistance. Therefore, the bulb will not glow if current is passed. It would also melt - the filament has to be white-hot to be any use!
Why is a copper wire not used to make filaments of electric bulbs?
Because the filament is in effect a resistor. Copper is too good a conductor to provide resistance to the current, and would simply allow the current to complete the circuit. The light is generated by the filament glowing as it heats up in resistance to the current. Tungsten is a much better resistor.
Is titanium used to make the filaments in light bulbs?
Tungsten is used because it has a high melting point and maintains a high strength at high temperatures - like those required to make it hot enough to give off light as a filament in an electric bulb.
Which elements are used to make a filament?
The most common element used in making filaments is Tungsten.
Where might you find the element argon?
mainly in light bulbs, also to make a purple light.
I am trying to make a simple balloon detonator using an rf remote but the instruction states i need small gauge filament what is this?
A small gauge filament is a thin wire with a high melting point, just like the filament in light bulbs. That filament will heat up when electricity will pass through it. If you have enough battery power, I would suggest using a piece if pencil lead.
What make up the flower's filament and anther?
filament
What type of headlight bulb is brighter?
There are three main types of headlight bulb: Filament HID LED Filament are traditional bulbs, using a metal filament surrounded by halogen or xenon gas. Standard bulbs are normal, but headlight bulbs of up to twice the brightness, such as Osram Night Breaker are also available. HID use an arc of electricity, and are on some high end cars. Available as an upgrade, you need to add a ballast unit and a new bulb, so not a direct replacement. LED is only just becoming mainstream. No upgrade path from standard bulbs, as they need carefully designed fittings and controls to make them bright enough for main headlights, although they are common in sidelights, tail, brake and indicator bulbs.
How does the inactivity of noble gases make them useful?
We use them as atmospheres when we don't want something to react, particularly with oxygen. For instance in a filament electric lamp, the tungsten filament gets extremely hot. If the bulb contained air, the filament would oxidise immediately, as it does if the glass develops a crack. That's why we fill them with argon.
Is electric bulb glowing a example of chemical or physical changes?
It is a physical change. When you supply electricity, the electrons jump to higher energy state. When they come back to their level, it emits energy which falls in the visible region of light. The atoms of the filament (Tungsten) are not going through any change, that changes their chemical properties. Tungsten, still remains tungsten!
What does the nitrogen inside a light bulb do?
Yes, modern incandescent bulbs are filled with an inert gas (argon,) but with a bit of nitrogen. Nitrogen is used because argon supports long sparks and leads to electric arcs and exploding light bulbs, and nitrogen interferes with this effect.
