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The filament of electric bulb is made of...

The filament of electric bulb is made of .............. .

A

merury

B

copper

C

tungsten

D

none of these

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The filament of an electric bulb draws a current of 0.4 ampere.Calculate the amount of charge flowing through the filament if the bulb glows for 2 hours.Also calculate the number of electrons passed.

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