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JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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A copper rod of 132 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is:

(αCu=1.7×10−5 K−1\left(\alpha_{Cu}=1.7 \times 10^{-5} \mathrm{~K}^{-1}\right. and αAl=2.2×10−5 K−1)\alpha_{Al}=2.2 \times 10^{-5} \mathrm{~K}^{-1})
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Correct option: B
102 cm
Option B (102 cm) is correct because the length of the aluminum rod is calculated by equating the increase in length of both rods, considering their respective coefficients of linear expansion.

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