Which of the followings not an example of a bio-mass energy source?
A. wood

B. gobar-gas

C. nuclear energy

D. coal

Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.

How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?

Choose the correct statement

Mention three advantages of a solar cell?

Which part of the solar cooker is responsible for green house effect?

Name some of the solar energy devices.

Write the uses of solar cells.

Name that part of a box-type solar cooker which allows the sun’s rays to enter the box but does not allow inside heat to go out.

What difference would you expect in the charging of car battries

(i) in bright sunlight

(ii) on a cloudy day

(iii) at night?

Solar cells are used to provide the electric current to charge the batteries of a car driven by an electric motor. Describe the energy changes which take place.