SOURCES OF ENERGY
HOTS
1. The cost of production of electricity in thermal power station in Bihar is lesser than in Gujarat. Prove this statement by giving reasons.
2. Out of two solar cookers, one was covered and the other one was left open. Which one of the two will be more efficient and why?
3. The surface area of concentrator type solar heater is 5m2. It can reflect 80% of solar radiation incident while it absorbs the rest. Calculate energy concentrated by heaters as it focus in 2 hours if solar energy was delivered to it at the rate of 0.4 kJ/m2s
4. List three energy sources that are considered to be inexhaustible. State three reasons in support of your answer.
5. Why is there so much emphasis on changing over from petrol/diesel driven automobiles to CNG driven vehicles.
6. The increase in demand for energy is affecting our environment adversely. List two effects
7. What happens to waste of a nuclear plant system? How waste produced in nuclear power plants are different from those produced in thermal power plants?
8. What is acid rain? What are its harmful effects?
9. What is the use of black painted surface in a solar cooker?
10. Name the energy which is used in treatment of cancer.
11. What is the full form of CNG?
12. How much energy does earth�s upper atmosphere receive per square metre per second?