A. Why is the inside of the bulb in an incandescent lamp ventilated?
B. Which metal is used for filament construction?
c. Write the properties of this metal?
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Answer:
A)The typical incandescent light bulb contains a thin wire (usually tungsten) called a filament that has a high electrical resistance. ... Since there is no air (oxygen) in outer space, a filament without a glass covering would simply glow and not be consumed by traditional burning.
B)Tungsten is used for making filament of an electric bulb due to the following reasons: Being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature.
C)Properties of metals
high melting points.
good conductors of electricity.
good conductors of heat.
high density.
malleable.
ductile.
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Explanation:
tungstem is used in filament construction
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