Which of the following pairs of a source of power and its feature is correctly matched?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Solar power through photovoltaic cells – totally free from pollution
Making electricity from sunlight with photovoltaic cells burns nothing, so the technique is totally free from pollution.
Option (1) Solar power through photovoltaic cells – totally free from pollution — Correct. This pair is correctly matched.
Option (2) Mini-hydel plants – need large scale transmission towers and cables — Incorrect. Mini-hydel plants do away with the need for such towers and cables.
Option (3) Wind power – low initial cost — Incorrect. The initial cost of wind power is high.
Option (4) Thermal power – fly ash that reduces water pollution — Incorrect. Fly ash causes pollution of water bodies and land if not used properly.
NCERT (2026-27): “7.5 Strategies for Sustainable Development … Now, with the help of photovoltaic cells, solar energy can be converted into electricity. These cells use special kind of materials to capture solar energy and then convert the energy into electricity. This technology is extremely useful for remote areas and for places where supply of power through grid or power lines is either not possible or proves very costly. This technique is also totally free from pollution. …” “… This means that they can also do away with the need for large scale transmission towers and cables and avoid transmission loss.” “… No doubt, the initial cost is high. …” |