Question

tungsten is used in electrical bulb why​

Answer 1

Answer:

Explanation:

Tungsten was not the first filament material. Carbonized thread and platinum were were used successfully in the late 1800's. Carbonized thread is not very durable and platinum is too expensive and rare.

Thomas Edison, who had purchased an incandescent light patent from a Canadian, commercialized a carbonized bamboo filament that finally made incandescent lighting reliable and affordable. However this material could not survive temperatures needed to produce white light very long. Tungsten wire is one of the few substances that can conduct sufficient electricity to reach 7000 Degrees C while maintaining enough strength to last thousands of hours and survive mild bumps and vibration. Platinum is far too expensive and most other metals would melt or evaporate at those temperatures. Lower temperatures give a more feeble orange light rather than the bright daylight white you get from tungsten.

Answer 2

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One good reason for tungsten to be used in the incandescent light bulb is that it has a very high melting point. The melting point for tungsten is around 3400 °C (~6200 °F), which is far greater than the actual temperature a bulb actually reaches. This also makes tungsten the metal with the highest melting point.