Q. Which metal is used in making electrical fibres?
Solution:
Tungsten, or wolfram, is a chemical element with the symbol W and atomic number 74. Tungsten is a rare metal found naturally on earth almost exclusively as compounds with other elements.
The melting point and resistivity of Tungsten are very high. At high temperatures, it does not burn quite well. The temperature of the electric lamps is extremely high. Hence, tungsten is mainly used as the heating element of electric bulbs.
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