Question

What is the use of a glass bulb in an electric bulb? Can we use the electric bulb without the glass bulb in the space?

Answer 1

1. In an electric bulb, the filament of the bulb is connected with lead supports and this lead support is connected with another glass support.
2. The glass support is given because the filament has high resistivity and a lot of heat is generated when the current will flow in the filament.
3. Because glass has low thermal conductivity.
4. If there would be no glass inside the glass then the cylindrical portion of the glass can attain a very high temperature resulting in damage to the circuit.
5. So, a glass bulb is a must inside the electric bulb.