Select the correct answer. The heating curve shows the energy gain of a substance as it changes from solid to gas. Which section of the graph shows the liquid phase of the substance
gaining kinetic energy?
A. A
B. B
C. С
D. D
E. E

c (diamond),

sio2 (quartz)

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.