Electric Bulb
Electric Bulb
An electric bulb or a torch bulb has an outer case made of glass that is fixed on a metallic base. The internal structure of a bulb consists of a tiny, thin wire called a filament. The filament is made up of tungsten and is fixed to two thick wires that provide support to it as shown in the figure below
There are two lead wires, one of these thick lead wires is connected to the metal case at the base of the bulb. The other thick lead wire is connected to the metal tip at the centre of the base. The metal tip at the centre of the base and the metal casing at its lower end act as terminals of These two terminals of the bulb are fixed in such a way that they do not touch each other.
When an electric current is passed through the filament of the bulb, the filament becomes hot and emits light.
A hammer, a gong, and a soft iron strip are all parts of __________________ | |||
| Right Option : B | |||
| View Explanation | |||
The filament of an electric bulb is of tungsten because __________________________. | |||
| Right Option : C | |||
| View Explanation | |||
Filament of a torch bulb is __________________
| |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
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