Question

In an electric bulb, light is produced due to the glowing of

• A. the glass case of the bulb
• B. the thin filament
• C. the thick wires supporting the filament
• D. gases inside the glass case of the bulb

Answer 1

The correct option is B

the thin filament

1. A light-emitting bulb is one that emits light in general.
2. The light bulb consists of a glass bulb, filament, and base of the light bulb.
3. The filament receives current through wire or terminals implanted in the glass.
4. Tungsten is used to make the filament, which is a coiled thin wire.
5. Tungsten was chosen as the filament because of its high melting point, which prevents the filament from melting at high temperatures.
6. The filament is contained within a globe-shaped glass mount and is connected to the lamp's base by copper and lead wires.
7. The wires and filament are contained within a glass bulb filled with an inert gas such as argon.
8. Because argon is an inert gas, it preserves the filament from burning also extending its lifespan.
9. The bulb is made of thin glass that prevents air from reaching the filament and so protects it from burning.
10. The light bulb works on a relatively simple principle: an electric current is passed through a tiny filament, causing it to heat up. The bulb shines because heated items often emit light.

Hence, option B is the correct answer.