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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

B

small

C

very large

D

any value

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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

NARAYNA-TRANSMISSION OF HEAT-C .U .Q
  1. If T(B) and T(s) are the temperatures of the body and the surroundings...

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  2. Newton's law of cooling is a law connected with .

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

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  4. A block of steel heated to 100^(@)C is left in a room to cool Which of...

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  5. Let there be four articles having colours blue red black and white. Wh...

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  6. Which of the following qualities are best suited for cooking utensils ...

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  7. The bulb of a thermometer is spherical and that of another is cylindri...

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  8. Which of the following methods of flow of heat is (are) based on gravi...

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  9. Two rods A and B of same metal and of same cross-section have length i...

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  10. While measuring the thermal conductivity of liquids the upper part is ...

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  11. The templitude of radiations from a cylindrical heat source is related...

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  12. Kirchoff's law states that

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  13. If pressure on a gas is increased from P to 2P then its heat conductiv...

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  14. Two layers of cloth of equal thickness provide warmer covering than a ...

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  15. In a room containing air, heat can go from one place to another

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  16. The reflectance and emittance of a perfectly black body are rspectivel...

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  17. Wien's displacement law fails at .

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

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  19. Two circular disc A and B with equal radii are blackened. They are hea...

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  20. A solid at temperature T(1) is kept in an evacuated chamber at tempera...

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