The electrical domestic tube light gives white fluorescent light because of
A). Colision between molecules of filled gas under electric current
B). Heavy current
C). Vacuum inside the tube
D). Falling of ultra violet rays on the white inner coating of the tube
Falling of ultra violet rays on the white inner coating of the tube
The electrical domestic tube light gives white fluorescent light because of falling of ultra violet rays on the white inner coating of the tube. The ultraviolet rays have high frequency and shorter wavelength are converted to visible white light with lower frequency and greater wave length.
1. Which of the following refers to too much electricity and may cause a voltage surge?
2. A carbon microphone is best used in
4. Which of the following is a compound machine?
5. Which of the following is an example for cantilever beam?
6. On a stationary sail boat, air is blown from a fan attached to the boat. The boat
7. 1 WH =
8. The time period of a pendulum when taken to the Moon would:
9. Which of the following was the first theory of superconductivity?