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Which one of the following metals is most commonly used for making filament of incandescent electric bulbs?

Options

  1. AAluminium
  2. BSilver
  3. CCopper
  4. DTungsten

Correct answer

D. Tungsten

Step-by-step solution

Incandescent bulbs typically use a tungsten filament because of tungsten's high melting point. A tungsten filament inside a light bulb can reach temperatures as high as 4,500 degrees.

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