Electric Bulb Filament Identification
The component in an electric bulb responsible for producing light is a thin wire known as the filament.
When electric current passes through this wire, it heats up to a very high temperature and glows, emitting light. This process is called incandescence. The material used for the filament needs to withstand these extreme temperatures, which is why tungsten is commonly used.
Analyzing Other Options
- Fuse: A fuse contains a wire designed to melt and break the circuit if the current exceeds a safe level, preventing damage. It does not produce light.
- Relay: A relay is an electrically operated switch used to control another circuit. It does not produce light.
- Resistor: A resistor is a component used to impede or resist the flow of electric current, often to control voltage or current levels. It does not produce light intentionally, although some may generate heat.
Therefore, the correct term for the light-emitting wire in an electric bulb is the filament.
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Important Questions from Physics
What is the colour of the light emitted by the Sun?
Lightning occur in the sky when two clouds:
With reference to street-lighting, how do sodium lamps differ from LED lamps?
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2. As street lights, sodium lamps have a longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below.
Which one of the following is a reason why astronomical distances are measured in light-years?
In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?
1. Area of the hole in the lid
2. Temperature of the flame
3. Weight of the lid
Select the correct answer using the code given below.
