1How does a photovoltaic cell produce electricity?
2Why must a solar panel be fixed in a well sunlit place?
3What are the four main components of a solar street light, and how does it switch itself on at dusk?
4Describe the structure of a solar dryer. Why is drying food in it better than drying in the open sun?
5How does water circulate in a solar water heater without a pump? Why does the water stay hot even at night?
6Why does a solar cooker use a curved shiny surface and a black pot?
7How do a solar panel and a solar water heater use solar energy differently?