Why is tungsten used in filament of bulbs and which law is it based on?
Answers
Tungsten (W) is usually used to make filaments of bulbs because of its high melting point ( 3695 K ).
When high amount of electric current passes through the filament, there is a loss of energy as heat due to the resistance of the filament material. Hence the temperature of the filament (and also the bulb) increases. If any other element is used instead of Tungsten, it would melt due to high temperature. Hence Tungsten is used.
Answer:
Tungsten is used as it has high melting point
Light bulbs glows when electricity is passed through the filament. High melting point tungsten has melting point of 3422C so it doesn't melt when current is passed it doesn't melt. ... This helps the filament not to get separated from the electrodes. Due to all these properties of tungsten, it is used in light bulbs.