PhysicsThermal expansionWAEC
A metal rod 2 m long is heated through 50 K. If its linear expansivity is 1.2 × 10⁻⁵ K⁻¹, find the increase in length.
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Answer: B. 1.2 × 10⁻³ m
Δl = αlΔθ = 1.2 × 10⁻⁵ × 2 × 50 = 1.2 × 10⁻³ m.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.