The power generated in a windmill:

Write the general principle involved in generating nuclear energy. Name one fuel used in a nuclear reactor.

$(i)$ Write the value of the solar constant of the Sun.
$(ii)$ What type of mirror is used in a box-type solar cooker?
$(iii)$ Why is it difficult to use hydrogen as a source of energy?
$(iv)$ What is the maximum temperature attained in a concave reflector-type solar cooker?
$(v)$ Fossil fuels are classified as a non-renewable source of energy. Explain why.

State any two activities from our daily life in which solar energy is utilized.

What is natural gas? How is it formed?

Compare the advantages of generating energy from biomass with those of generating it from a hydropower plant.