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Newton's law of cooling holds good provi...

Newton's law of cooling holds good provided the temperature difference between the body and the surroundings is .

A

large wavelength

B

small

C

the same

D

very small

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The correct Answer is:
B
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Newton’s law of cooling, holds good only if the temperature difference between the body and the surroundings is

Newton's law of cooling refers to

Newton laws OF cooling

Newton’s law of cooling says that the rate of cooling of a body is proportional to the temperature difference between the body and its surrounding when the difference in temperature is small. (a) Will it be reasonable to assume that the rate of heating of a body is proportional to temperature difference between the surrounding and the body (for small difference in temperature) when the body is placed in a surrounding having higher temperature than the body? (b) Assuming that our assumption made in (a) is correct estimate the time required for a cup of cold coffee to gain temperature from 10^(@)C to 15^(@)C when it is kept in a room having temperature 25^(@)C . It was observed that the temperature of the cup increases from 5^(@)C to 10^(@)C in 4 min

Which law of cooling holds for really larege temperature differences ?

Newton's law of cooling is relevant with

NIKITA PUBLICATION-KINETIC THEORY OF GASES & RADIATION -MCQs (Newtons Law of Cooling)
  1. There is a circularr hole in a square copper plate. If the plate is he...

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  2. Newton's law of cooling is used in laboratory for the determination of...

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  3. Newton's law of cooling holds good provided the temperature difference...

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  4. Newton's law of cooling leads us to the following expression.

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  5. Newton's law of cooling is valid for

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  6. When a body of mass M loses heat, the rate of fall of temperature is p...

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  7. A solid sphere of copper of radius R and hollow sphere of copper of in...

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  8. A mechanism of equalization of temperature of a body by thermal radiat...

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  9. The Newton's law of cooling is based on

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  10. Newton's law of cooling is also applicable to

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  11. A solid sphere, cube and a cylinder of same material and density, are ...

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  12. A solid sphere and a hollow sphere of the same material and of equal r...

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  13. Newton's law of cooling can be obtained from

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  14. In simple radiation correction, correction in the temperature is due t...

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  15. A metal sphere cools from 72^(@)C to 60^(@)C in 10 minutes. If the sur...

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  16. A body cools in 7 minutes from 60^(@)C to 40^(@)C. What will be its t...

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  17. Newton’s law of cooling, holds good only if the temperature difference...

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  18. A body takes, 4 minutes to cool from 100^(@)C to 70^(@)C, if the room ...

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  19. A body in a room cools from 85^(@)C to 80^(@)C in 5 minutes. Then the ...

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  20. A hot water kept in a beaker placed in a room cools from 60^(@)C to 50...

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