the same amount of current flows through the connecting wires and the bulb filament how far it is only the filament that glows why
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Heya friend!!
Rajdeep here...
A filament is usually made up of tungsten and connecting wires are made up of copper.
Note:
Tungsten has a very, very high resistivity than copper, due to which, when current flows through it, a huge amount of heat is generated to the extent that makes the tungsten filament glow. Copper does not get heated up as it is a good conductor having less resistivity.
Moreover, tungsten have a high melting point (=3000°C), so even if a high temperature is reached, it dies not melt.
Thanks!!
Rajdeep here...
A filament is usually made up of tungsten and connecting wires are made up of copper.
Note:
Tungsten has a very, very high resistivity than copper, due to which, when current flows through it, a huge amount of heat is generated to the extent that makes the tungsten filament glow. Copper does not get heated up as it is a good conductor having less resistivity.
Moreover, tungsten have a high melting point (=3000°C), so even if a high temperature is reached, it dies not melt.
Thanks!!
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