Question

In electrical bulbs light is produced due to _____________

The presence of argon gas inside the bulb
The heating effect produced by the thick straight supporting wires
The heating effect produced by the thin coil of metal

Answer 1

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The filament of an electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the filament which gives off light

Answer 2

Answer:

1. The filament of an electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the filament which gives off light.

2. Argon gas is used in light bulbs to stop the oxygen in the light bulbs from corroding the hot tungsten filament. The use of argon in light bulbs prevents the evaporation of the tungsten filaments, which results in increased light bulb life.