Which of the following is not a non-conventional source of energy ?

1. Nuclear energy
2. Tidal energy
3. Petroleum energy
4. Wind energy

Birth rate is technically termed as :

1. Population density
2. Natality
3. Carrying capacity
4. Mortality

What are the age restrictions for marriage by law for boys and girls in India?

1. 18 years, 21 years
2. 21 years, 19 years
3. 21 years, 18 years
4. 18 years, 17 years

Increasing population would need more and more energy. So various new sources of energy, like solar energy, tidal energy and wind energy are being used to cope with the rising energy demands. The figure given below shows a solar battery which can be used to produce energy for big buildings like schools, hospitals, etc.

Which of the following options holds true for solar energy ?

1. Solar energy is non-conventional and non-renewable.
2. Solar energy is conventional and renewable.
3. Solar energy is conventional and non-renewable.
4. Solar energy is non-conventional and renewable.