tungsten is used almost exclusively for filament of electric bulb because
LectureNotes said tungsten is used almost exclusively for the filament of an electric bulb because
Answer: Tungsten is the preferred material for the filament of electric bulbs due to several key characteristics it possesses:
High Melting Point: Tungsten has an extremely high melting point of 3422°C, allowing it to operate at high temperatures without melting in the normal operation of an incandescent light bulb.
Durable and Long-Lasting: Tungsten is very durable and can withstand the repeated heating and cooling cycles that occur when the light bulb is turned on and off.
Efficient Light Emission: Tungsten filaments emit a bright white light when heated, making them ideal for light bulb filaments.
Inert Nature: Tungsten is chemically inert and does not readily react with gases in the bulb, allowing it to have a long lifespan without getting oxidized easily.
Economical: While tungsten is a rare and expensive metal, its efficiency, durability, and long life make it a cost-effective choice for light bulb filaments in the long run.