The coefficient of linear expansion of a rod of length 2m varies with distance x from end of the rod as where.Find the increase in length of the rod when heated through 350°C.

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1.225 mm

0.1225 mm

12.25 m

122.5 mm

answer is C.

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Detailed Solution

If de be the thermal expansion of an element of length dx, we can write, where Δθ = rise in temperature. α.dx.

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