14

Time: 1 hour

Maximum Marks: 30

1.  What is the nuclear fission process?          [1]

2.  Name any two gases, which are major constituents of biogas.          [1]

3.  What is a solar cell panel?          [1]

4.  Give the names of any two devices that utilize solar energy.          [1]

5.  Outline the energy conversion that takes place in a hydro power plant.          [1]

6.  Why can CNG be considered as an environment friendly fuel?          [1]

7.  Define anaerobic degradation.          [1]

8.  What is the typical range of voltage and power of a solar cell, when exposed to the sun?          [1]

9.  What is the condition under which ocean thermal energy can be trapped and used?          [1]

10.  What is the cause of geothermal energy?          [1]

11.  Define bio�mass. Give two examples.          [2]

12.  What are the limitations of using wind energy?[2]

13.  Why is it difficult to use hydrogen as a source of energy?          [2]

14.  What is acid rain? What are its harmful effects?          [3]

15.  What characteristics should an ideal fuel possess?          [3]

16.  Give the advantages and disadvantages of solar cell panels.          [3]

17.  (i) What is the use of black painted surface in a solar cooker?          [5]

(ii) What is the unit in which nuclear energy is expressed? How is it related to joule?

(iii) Give the disadvantage of generating hydro�electricity.

OR

Discuss the working of a hydro power plant using a labeled diagram