A composite rod is made of copper - -1-8- 10-5K-1 and steel 1-2-10-5K-1 as shown in figure- is heated up- then it

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Standard XII

Physics

Thermal Expansion

A composite r...

Question

A composite rod is made of copper $α = 1.8 \times 10^{- 5} K^{- 1}$ and steel $1.2 \times 10^{- 5} K^{- 1}$ as shown in figure, is heated up, then it

bends with steel on concave side

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bends with copper on concave side

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dose not expand

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data is insufficient

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Solution

The correct option is A $bends with steel on concave side$

When a bimetallic strip is heated, it bends with metal of lesser $α$ on inner side, i.e concave side.

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A composite rod is made of copper α=1.8×10−5K−1 and steel 1.2×10−5K−1 as shown in figure, is heated up, then it

The correct option is A bends with steel on concave side When a bimetallic strip is heated, it bends with metal of lesser α on inner side, i.e concave side.

A composite rod is made of copper $α = 1.8 \times 10^{- 5} K^{- 1}$ and steel $1.2 \times 10^{- 5} K^{- 1}$ as shown in figure, is heated up, then it

The correct option is A $bends with steel on concave side$

When a bimetallic strip is heated, it bends with metal of lesser $α$ on inner side, i.e concave side.