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A copper wire of length 1 increases in l...

A copper wire of length 1 increases in length by 0.2% on heating from `20^@C` to `40^@C`. Then percentage change in area of copper plate of dimension `31xx 21` on heating from `20^@C` to `40^@C` is

A

0.1%

B

0.2%

C

0.4%

D

0.6%

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CHETANA PUBLICATION-THERMAL PROPERTIES OF MATTER-EXERCISE
  1. Railway tracks are laid with gaps for expansion. The gap between the s...

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

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

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  4. Celsiusscale is calibrated according to........

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

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  6. Specific heat of water is

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

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

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  9. 32^@F is equal to

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

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  11. The melting point of pure ice is

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  12. The boiling point of pure water is

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  13. Specific heat capacity is expressed as

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  14. Latent Heat of fusion of ice is

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

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

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

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

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  19. A body cools from 51^@C to 50.9^@C in 10 sec. If surrounding temperatu...

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  20. The cooling curve is represented by graph.......... A B C D

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