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Standard VIII

Physics

Types of Expansion in Solids

Two rods A an...

Question

Two rods A and B of the same metal, but of length $1 m$ and $2 m$ respectively, are heated from $0^{\circ} C$ to $100^{\circ} C$ . 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.

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Two rods A and B of the same metal, but of length 1 m and 2 m respectively, are heated from 0 ∘C to 100 ∘C. Then, ___.

Two rods A and B of the same metal, but of length $1 m$ and $2 m$ respectively, are heated from $0^{\circ} C$ to $100^{\circ} C$ . Then, ___.