They're made of Tungsten.
The filament in a light bulb is typically made of tungsten, due to its high melting point and resistance to heat. Other materials, such as carbon or other metals, can also be used in some types of light bulbs.
Glass is used in light bulbs because it's clear (passes the light through), can withstand the heat generated by the filiment and does not leak air to the inside of the bulb. And, it's cheap and easily formed into the required shape(s)
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.
No, bulbs do not make use of magnets to work. Light bulbs function by passing electricity through a filament, which then emits light and heat. Magnets are not involved in the process of generating light in bulbs.
Well, isn't that a happy little question! Copper can indeed be used to make filaments for light bulbs. Its high melting point and excellent conductivity make it perfect for this purpose. Just imagine all the beautiful light that filament will create, lighting up the world with its warm glow.
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.
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.
Halogen bulbs typically operate at higher temperatures than incandescent bulbs because of their tungsten filament design, which allows them to produce brighter and whiter light. This can make halogen bulbs hotter to the touch compared to traditional incandescent bulbs.
The most common element used in making filaments is Tungsten.
When a magnet is brought near a light bulb, the magnetic field interacts with the electric current flowing through the filament, causing a force to be exerted on the filament. This force can make the filament move or vibrate, resulting in changes in the brightness or flickering of the light 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!
mainly in light bulbs, also to make a purple light.