Two rods A and B of the same metal, but of length 1m and 2m respectively, are heated from 0∘C to 100∘C. Then, ___.
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Solution
The thermal expansion of a solid depends on its:
Initial length
Material
Change in temperature
All these parameters are directly proportional to thermal expansion. Since the material and change in temperature is same for both the rods, the thermal expansion of rod depends upon their initial lengths. Here, the rod B has more length so rod B elongates more than the rod A.