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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`.

A

First heated in cooled

B

First cooled then heated

C

Is heated

D

Is cooled

Text Solution

Verified by Experts

The correct Answer is:
D
Coefficient of linear expansion of brass is greater than of steel `1`.
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ALLEN -GEOMETRICAL OPTICS-EXERCISE -01
  1. In a vertical U-tube containing a luquid, the two arms are maintained ...

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  2. A steel rod of length 1 m is heated from 25^@ "to" 75^@ C keeping its ...

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  3. A brass disc fits snugly in a hole in a steel plate. Should you heat o...

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  4. The variation of lengths of two moles rods A and B with change in temp...

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  5. A steel tape placed around the earth at the equator when the temperatu...

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  6. Bars of two different metals are bolted together , as shown in figure....

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  7. A metal rod A of length l(0) expands by Deltal when its temperature is...

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  8. The coefficient of linear expansion 'alpha' of a rod of length 2 m var...

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  9. The coefficient of linear expansion 'alpha' of the material of a rod o...

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  10. A clock with a metallic pendulum gains 6 seconds each day when the tem...

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  11. A steel scale measures the length of a copper rod as l(0) when both ar...

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  12. The coefficient of apparent expansion of a liquid when determined usin...

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  13. Three rods of the same dimensions have thermal conductivities 3k , 2k ...

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  14. A cup of tea cools from 80^(@)C to 60^(@)C in one minute. The ambient ...

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  15. Ice starts forming in lake with water at 0^(@)C and when the atmospher...

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  16. There is a small hole in a container. At what temperature should it be...

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  17. A surface at temperature T(0)K receives power P by radiation from a sm...

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  18. Two different rods A and B are kept as shown in figure . The variation...

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  19. The area of cross-section of rod is given by A= A(0) (1+alphax) where ...

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  20. Following graph shows the correct variation in intensity of heat radia...

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