Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun's energy?

Fuel used in thermal power plant is 

In a hydro power plant

Which is the ultimate source of energy?

Which one of the following forms of energy leads to least environment pollution in the process of its harnessing and utilization?

The major problem in harnessing nuclear energy is how to?

The main constituent of biogas is

Choose the correct statement?

In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because

Choose the incorrect statement

What are the applications of solar cells?

Name the gas which is the major constituent of bio gas?

What are fossil fuels?

What is meant by fusion?

What is renewable source of energy?

What is a good source of energy?

Why are we looking at alternate sources of energy?

What is geometry energy?

Compare and contrast fossil fuels and the Sun as direct sources of energy.

What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?

It is said that a differences of 20^o C in temperature of water at two levels can be exploited to generate electricity. Name the plant that can be used for this purpose. Describe the process and give its main advantages

Mention three advantages of a solar cell.

What are the limitations in obtaining energy from wind?

List any four characteristics of biogas on account of which it is considered an ideal fuel

What is the cause of release of unusually large energies in nuclear fusion reactions?

Which is the process used to harness nuclear energy these days? Explain it briefly.

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

(i) Write the value of solar constant of Sun.
(ii) What type of mirror is used in Box Type Solar Cooker?
(iii) Why it is difficult to use hydrogen as a source of energy?
(iv) Fossil fuels are classified as non-renewable source of energy. Explain why.