Because tungsten is having high resistance and therefore heat loss will be more
The metal used in domestic light bulbs is typically tungsten. Tungsten has a high melting point and is able to withstand the high temperatures generated by the electric current passing through it, making it ideal for use in light bulb filaments.
Because it is simply too expensive and there is not enough gold.
You can use ordinary tungsten to mark
tungsten <<>> Also along with the above, aluminium for the shell, steel for the filament holders, and in past years brass was used for the shell until manufactures found out it was cheaper to use aluminium for the job.
Fire
mold for tungsten carbide
Light bulb filaments.
it is used in compounds
Generally, tungsten.
Advantages are that Tungsten is a very good electricl conductor. Better than copper
Tungsten in the form of Tungsten carbide is widely used in masonry drill tips, and in paint scrapers for handymen. It has a significant use in the filament of incandescent light bulbs. As a weld application, it may be used as a hardening on the cutting edge of the blades of bulldozers, and excavator buckets. So very few countries would not use tungsten.
Any characteristic of a product that hinders its use for its intended purpose is a product defect. The defect can cause a product to be dangerous or useless.