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JEE Main 21 Jan 2026 Shift 1 Paper Solved Paper

Section: Physics

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Question : 30

Total: 75

An aluminium and steel rods having same lengths and cross-sections are joined to make total length of 120 cm at 30∘C. The coefficient of linear expansion of aluminium and steel are 24×10−6∕‌∘C and 1.2×10−5∕‌∘C, respectively. The length of this composite rod when its temperature is raised to 100∘C, is ____ cm .

[21 Jan 2026 Shift 1]

120.20
120.06
120.15
120.03

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