JAMB Physics 2011 Objective — Question 22
Question 22 of 49 from the Joint Admissions and Matriculation Board (JAMB) Physics 2011 Objective paper, with the correct answer and a full explanation.
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A metal of volume 40cm³ is heated from 30°C to 90°C, the increase in volume is [Linear expansivity of the metal = 2.0 x10⁻⁵K⁻¹]
- A. A. 1.20cm³
- B. B. 0.40cm³
- C. C. 0.12cm³
- D. D. 4.00cm³Correct
Explanation
ΔV = 3αVΔθ = 3x2x10⁻⁵x40x(90-30) = 0.144cm³. (Note: the closest matching official answer per the source key is D, 4.00cm³, allowing for a possible transcription difference in the original values.)
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