UGC NET Questions (Paper – 1)

Renewable resources are those that can be replenished naturally within a relatively short period. Examples include solar,wind,hydro and geothermal energy. Because these sources are not permanently depleted when used,they can support long term sustainable energy use. Therefore the description in the question clearly points to renewable resources.

Option A:
Fossil fuels such as coal,oil and natural gas are formed over millions of years. Once extracted and burned,they cannot be quickly replenished on a human time scale. Hence they are not renewable and do not fit the description in the stem.

Option B:
Exhaustible resources are those that can be depleted if used excessively. Many non renewable resources fall into this category. The term does not highlight the ability to be naturally replenished,so it is not the best match here.

Option C:
Renewable resources are naturally replenished at a rate comparable to their rate of use. Solar and wind energy are classic examples of this category. Therefore the term renewable correctly describes the type of resource mentioned in the question.

Option D:
Non-renewable resources exist in finite amounts and are not replaced within human time scales. Fossil fuels and many mineral deposits fall into this group. This is the opposite of what is described in the question,so it is not correct.

Wind energy is continuously replenished by atmospheric processes driven by solar heating and Earth’s rotation. Using wind to generate electricity does not deplete the underlying resource. This aligns with the definition of a renewable resource. Therefore renewable is the appropriate label in the question.

Option A:
Renewable resources can be used repeatedly without being exhausted if managed properly. Wind turbines harness the kinetic energy of moving air without permanently reducing future wind. This characteristic makes wind energy a classic renewable resource.

Option B:
Non renewable resources such as coal,oil and natural gas are finite and form over geological timescales. Once burned,they cannot be quickly replaced. Wind does not share these constraints,so non renewable is an incorrect classification here.

Option C:
Fossil based resources originate from ancient organic matter converted into fuels like coal and petroleum. Wind has no such origin and is not derived from fossil material. Thus fossil based is not a valid description for wind energy.

Option D:
Nuclear based energy relies on fission or fusion of atomic nuclei,commonly using uranium. Wind energy generation does not involve nuclear reactions,so categorising it as nuclear based would be wrong.