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      Question

      Tungsten is used for the manufacture of the filament of

      an electric bulb, because –
      A It is a good conductor Correct Answer Incorrect Answer
      B It is economical Correct Answer Incorrect Answer
      C It is malleable Correct Answer Incorrect Answer
      D It has a very high melting point Correct Answer Incorrect Answer

      Solution

      Tungsten is used because it has the highest melting point of all the metallic elements. It melts at 3410 degrees Celsius. When currentpassesthroughthefilamentitheatsitup. Whenthefilamentreachesacertaintemperature itstartstogiveofflight,that'showwegetalight bulb. The first successful light bulb filaments were made of carbon(fromcarbonizedpaper or bamboo).

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