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. List three energy sources that are considered to be inexhaustible. State three
reasons in support of your answer.
4. Why is there so much emphasis on changing over from petrol/diesel driven
automobiles to CNG driven vehicles.
5. The increase in demand for energy is affecting our environment adversely. List
two effects
6. 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?
7. What is acid rain? What are its harmful effects?
8.What is the use of black painted surface in a solar cooker?
9. Name the energy which is used in treatment of cancer.
10. Expand OTEC.How does it help harness energy from the sea?
11. How much energy does earth's upper atmosphere receive per square metre per
second?
Answers
Answer:
1) Yes, it is so because in Bihar/Jharkhand/Odhisa coal for thermal power plant is easily available, whereas it has to be transported to the thermal power plants in Gujarat/Maharashtra, which would be costly.
2) The solar cooker covered by plane glass slab will be more efficient than the one which is left open. This is due to the reason that the plane glass slab enables the cooker to trap heat inside it.
3) The 3 energy sources that are inexhaustible are: 1) Solar: Solar energy is harnessed from the sun by using different types of technologies. It is a renewable source of energy. 2) Wind: Wind is an affordable, sustainable and a clean source of energy. 3) Tides: Tidal energy is harnessed from the movement of the tides.
pls Post few questions at a time only.