Name the chief component of solar cells. What energy conversion takes place in a solar cell?

"Electricity generated by the water stored in a dam can be considered to be another form of solar energy." Explain by describing the series of energy transformations in sequence taking place during the process.

What is the use of a glass sheet in solar heating devices?

Why is hydrogen considered a cleaner fuel compared to $CNG$?

The average amount of energy released during the fission of a uranium atom is: (in $,MeV$)

In a hydroelectric power plant,more electrical power can be generated if water falls from a greater height because: