Q.

An iron tyre is to be fitted onto a wooden wheel 1.0 m in diameter. The diameter of the tyre is 6 mm smaller than that of wheel. The tyre should be heated so that its temperature increases by a minimum of : (coefficient of volume expansion of iron is 3.6 10-5 /°C )

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a

167°C

b

334°C

c

500°C

d

1000°C

answer is A.

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Detailed Solution

Δ|=|α⋅Δθ Solving, Δθ=500∘C.
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An iron tyre is to be fitted onto a wooden wheel 1.0 m in diameter. The diameter of the tyre is 6 mm smaller than that of wheel. The tyre should be heated so that its temperature increases by a minimum of : (coefficient of volume expansion of iron is 3.6 10-5 /°C )