A
Only one
B
Only two
C
Only three
D
All four
Correct answer: (d) All four
Explanation
- A
Only one
Only one. All four are DERs.
- B
Only two
Only two. Under-counts.
- C
Only three
Only three. Rooftop solar, batteries, fuel cells and biomass gensets are all distributed.
- D
All four
All four. Behind-the-meter / grid-edge resources.
Summary. Official key is (d) all four. Distributed Energy Resources sit at or near the load: rooftop PV, battery storage, fuel cells and small biomass generators. None of the four is a centralised utility-scale-only category in this listing.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.
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2024 · Q31 · General Studies · 2 marks
With reference to radioisotope thermoelectric generators (RTGs), consider the following statements: 1. RTGs are miniature fission reactors. 2. RTGs are used for powering the onboard systems of spacecrafts. 3. RTGs can use Plutonium-238, which is a by-product of weapons development Which of the statements given above are correct?