Question

(a)What material is used in making the filament of an electric bulb?
(b) Name the characteristics which make it suitable for this.

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Answer 1

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(a) Tungsten is used in making the filament of an electric bulb

(b) Characteristics of tungsten :

• it has low vapor pressure and high melting point ( 3380 °C )

• it is not melt at high temperature

• it has high tensile strength

This are the reasons why tungsten used as a filament of electric bulb