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Railway tracks are laid with gaps for expansion. The gap between the steel rails 20 m long is 1.2 cm at `10^@C`. The temperature at which the steel rails just touch each other is `( prop steel = 12 xx 10^-6//^@C)`

A

`50^@C`

B

`40^@C`

C

`60^@C`

D

`30^@C`

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CHETANA PUBLICATION-THERMAL PROPERTIES OF MATTER-EXERCISE
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  2. Iron sheet 50 cm X 20 cm is heated through 100^@C. If prop = 12 xx 10^...

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  3. Railway tracks are laid with gaps for expansion. The gap between the s...

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  4. An iron ball is heated. Then percentage increase will be largest in

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  5. A copper wire of length 1 increases in length by 0.2% on heating from ...

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  7. A constant temperature volume of given mass of gas is inversely propor...

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  8. Specific heat of water is

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  9. For measurement of heat,.....is used.

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  10. Quantity of heat required to change state of unit masssubstance withou...

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  11. 32^@F is equal to

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  12. The temperature and pressure at the triple point of water are

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  13. The melting point of pure ice is

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  14. The boiling point of pure water is

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  15. Specific heat capacity is expressed as

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  16. Latent Heat of fusion of ice is

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  17. The temperature gradient of a rod of length 1 m is 60^@C//m. If the te...

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  18. The thermal conductivity of a metal plate is 80 w//mk. If the thicknes...

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  19. A wall of a room has dimensions of 6m xx 4m. It is 60 cm thick. Its th...

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  20. A body cools from 62^@C to 50^@C in 10 minutes. If the surrounding tem...

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