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CBSE Class 10 Answered

copper wire cannot be used as a filament in an electric  bulb.
Asked by arajeevshashank | 01 Feb, 2018, 10:38: AM
answered-by-expert Expert Answer
The traditional tungsten filament bulb works on the principle of heating effect of electric current.
This effect requires the filament to be of a very high resistance, so that the filament heats up and gives out light for illumination.
A copper wire has very low resistance, therefore, it is used for wires for conduction and transmission of electricity but cannot be used as a filament in a bulb working on the principle of heating effect of electric current.
Answered by Abhijeet Mishra | 01 Feb, 2018, 11:49: AM

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