Paper 1 · People, Development and Environment
UGC NET December 2022 (14.03.2023) Shift-I (Education)
Given below are two statements. Statement I: A flat-plate solar collector has an optical concentrator. Statement II: In a concentrating type solar collector, the area receiving the solar radiation is several times greater than the absorber area. In the light of the above statements, choose the correct answer from the options given below.
- Statement I: A flat-plate solar collector has an optical concentrator.
- Statement II: In a concentrating type solar collector, the area receiving the solar radiation is several times greater than the absorber area.
ABoth Statement I and Statement II are true
BBoth Statement I and Statement II are false
CStatement I is true but Statement II is false
DStatement I is false but Statement II is true ✓ Correct
Correct answer: (D) Statement I is false but Statement II is true — The answer is that Statement I is false but Statement II is true.
Explanation
★The answer is that Statement I is false but Statement II is true.
★A flat-plate collector absorbs sunlight directly and has no optical concentrator.
★So Statement I is false.
★A concentrating collector gathers radiation over a large aperture area.
★It focuses this onto a much smaller absorber, so the receiving area is several times the absorber area, making Statement II true.
★Thus only the second statement holds.
★So the answer is that Statement I is false but Statement II is true.
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