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Two thin metal strips one of brass and the other of iron are fastened together parallel to each other, a distance $1 m m$ apart to form a bimetallic strip. If the strips are of equal length at $00 C$ . The radius of the are formed by the bimetallic strip when heated to $600 C$ is (coefficient of linear-expansion of brass $= 19 × 10 − 6 / C 0$ and of iron $= 12 × 10 − 6 / C 0$ )

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3.57 m

2.38 m

5.57 m

0.57 m

answer is B.

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Detailed Solution

R = d α 1 − α 2 = 1 × 10 − 3 7 × 10 − 6 × 60 = 2.380 m

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