Post-UTME Physics 2017 Objective — Question 4
Question 4 of 20 from the Post-UTME Screening (Post-UTME) Physics 2017 Objective paper, with the correct answer and a full explanation.
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The coils and fins at the back of a refrigerator are painted black so that the refrigerator
- A. can produce ice blocks
- B. may not lose its cool temperature
- C. can absorb air for effective cooling
- D. can lose heat more rapidly through radiation.Correct
Explanation
Black surfaces are better emitters of heat by radiation, helping the coils/fins dissipate heat more effectively.
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