Post-UTME Physics 2019 Objective — Question 3
Question 3 of 20 from the Post-UTME Screening (Post-UTME) Physics 2019 Objective paper, with the correct answer and a full explanation.
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A metal block of mass 5 kg was heated from 15C to 45C. If the power consumed by the heater in 5 minutes was 80W, find the specific heat capacity of the metal.
- A. 75 Jkg-1 K-1
- B. 160 Jkg-1 K-1Correct
- C. 800 Jkg-1
- D. 4500 Jkg-1K-1
Explanation
Heat supplied = P x t = 80 x 300 = 24000J. Specific heat = Q/(mxdeltaT) = 24000/(5x30) = 160 Jkg-1K-1.
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