Physics
Grade-9
Easy
Question
Which of the following operates at low temperatures?
- Incandescent bulb
- Halogen bulb
- CFL
- All of them have same price
Hint:
CFL
The correct answer is: CFL
Cold cathode bulbs use a solid metal thimble which are significantly stronger and more durable than tungsten filaments. This is why cold cathode CFLs are able to function in rough service applications and cold temperatures that would quickly ruin a regular CFL bulb. Since cold cathode bulbs do not need to reach a high temperature to operate, they can easily light up in temperatures as low as -10 degrees Fahrenheit.
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