State the two forms in which energy is mainly utilised in our homes.

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

State whether the following statement is true or false:
Solar cells and solar panels cannot be used in remote areas.

State the forms in which energy stored in the oceans manifests itself. Which one of these is utilised in $OTEC$ systems?

What is the basic cause for winds to blow? Name a part of India where wind energy is commercially harnessed. Compare wind power and power of water flow in respect of generating mechanical and electrical energies. What is the hindrance in developing them?

State two merits of hydroelectricity.