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A brass disc fits snugly in a hole in a ...

A brass disc fits snugly in a hole in a steel plate. Should you heat or cool this system to losen the disc from the hole ? given that `alpha _b gt alpha _Fe`.

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The temp, coefficient of linear expansion for brass is greater than that for steel. On cooling the disc shrinks to a greater extent than the hole, and hence brass disc gets lossened.
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CBSE COMPLEMENTARY MATERIAL-PROPERTIES OF MATTER-MULTIPLE CHOICE QUESTIONS (MCQs)
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  4. A rigid bar of mass M is supported symmetrically by three wires each o...

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  6. For an ideal liquid : (More than one option may be correct)

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  14. Refer to the plot of temperating versus time showing the changes in th...

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  15. A student records the initial length l, change in temperature DeltaT a...

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  16. The approximate depth of an ocean is 2700 m. The compressibility of wa...

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  17. The Young's Modulus of steel is twice that of brass. Two wires of same...

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  18. Two rods of different materials having coefficients of thermal expansi...

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  19. In the given figure, if the dimension of the two wires are the same an...

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  20. The two ends of a metal rod are maintained at temperatures 100^(@)C an...

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  21. Steam at 100^(@)C is passed into 20 g of water at 10^(@)C, then water ...

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