Igcse Model Questions Vol1 2023 Physics Question 14
Practice objective / multiple choice question 14 from the 2023 Igcse Model Questions Vol1 Physics examination.
A bimetallic strip consists of two metals of equal thickness bonded together. Each metal is \(100\ \text{mm}\) long at \(20\ ^\circ\text{C}\). The coefficients of linear expansion are \(\alpha_A = 12\times10^{-6}\ \text{°C}^{-1}\) and \(\alpha_B = 20\times10^{-6}\ \text{°C}^{-1}\). When heated uniformly the strip bends into an arc whose radius of curvature (measured to the neutral axis midway through the thickness) is \(500\ \text{mm}\). If the total thickness of the strip is \(2.0\ \text{mm}\), determine the temperature increase \(\Delta T\) (in °C) that produced this curvature. Give your answer as an integer.
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About This Question
This is Igcse Model Questions Vol1 2023 Physics Question 14. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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