Question

why is the tungsten used almosr exclusively for filament of electric lamps​

Answer 1

Answer:

The melting point and of Tungsten is an alloy which has very high melting point and very high resistivity so does not burn easily at a high temperature. ... (e) Copper and aluminum are good conductors of electricity also they have low resistivity. So they are usually used for electricity transmission.

Answer 2

it is ductile ( can be drawn into thin wires ) and not a good conductor of electricity so it gets heat up and glow. It does decompose even on very high temperature.

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