At 50^{\circ} {C}, a brass rod and a steel rod of equal length 50 {cm} each and equal diameters are joined together. The composite rod is heated to 250^{\circ} {C}. Find the change in length of the composite rod. [\alpha_{B \text{ Bass }}=20 \times 10^{-6}{ }^{\circ} {C}^{-1} and \alpha_{\text{steel }}=12 \times 10^{-6}{ }^{\circ} {C}^{-1}]

AP EAPCET 6 Sep 2021 Shift 1 Paper

Question : 101 of 160

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At 50∘C, a brass rod and a steel rod of equal length 50cm each and equal diameters are joined together. The composite rod is heated to 250∘C. Find the change in length of the composite rod. [αB‌ Bass ‌=20×10−6‌∘C−1 and α‌steel ‌=12×10−6‌∘C−1]

0.28cm
0.32cm
0.30cm
0.20cm

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