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Q.

In an electric bulb the filament is made up of

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a

Tungsten

b

Steel

c

Copper

d

Iron

answer is C.

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Detailed Solution

Pure tungsten has some amazing properties including the highest melting point (3695 K), lowest vapor pressure, and greatest tensile strength out of all the metals. Because of these properties it is the most commonly used material for light bulb filaments.

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