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Prevost's theory of heat exchange tells ...

Prevost's theory of heat exchange tells that a body radiates thermal energy-

A

At temperature higher than that of surrounding only.

B

At temperature lower than that of surrounding only

C

At temperature equal to that of surrounding only

D

At all temperature

Text Solution

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The correct Answer is:
D
At all temperature.
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Explore conceptually related problems

Explain Prevost's theory of heat exchanges.

The power radiated by a black body is P, and it radiates maximum energy around the wavelength lambda_(0) . If the temperature of the black body is now changed so that it radiates maximum energy around a wavelength 3lambda_(0)//4 , the power radiated by it will increase by a factor of

The power radiated by a black body is P, and it radiates maximum energy around the wavelength lambda_(0) . If the temperature of the black body is now changed so that it radiates maximum energy around a wavelength 3lambda_(0)//4 , the power radiated by it will increase by a factor of

At what temperature does a body strip radiating heat ?

Does a body at 0^(@) C radiate any heat ?

When are the two bodies in thermal equilibrium?

A body is kept inside a container the temperature of the body is T_(1) and the temperature of the container is T_(2) the rate at which body absorbs the energy is alpha The emissivity of the body is The radiation striking the body is either absorbed or reflected A good absorber is .

A body is kept inside a container the temperature of the body is T_(1) and the temperature of the container is T_(2) the rate at which body absorbs the energy is alpha The emissivity of the body is e The radiation striking the body is either absorbed or reflected At what rate of body will absorb the radiant energy .

(a) Describe the principle of (i) a thermopile and (ii) a bolometer and show how these devices are used. (b) Define the term black body. What is meant by black body radiation ? As the temeprature of a black body rises, what changes take place in (i) the total energy radiated from it and (ii) the energy distribution amongst the wavelengths radiated ?

What is a black body ? On what factor does the radiation emitted depend ? Will the total radiation from it be more or less as compared to another body maintained at the same temperautre ? How does total energy radiated from it change with temperature? Is it possible for a black body to radiate white light ?

RESONANCE ENGLISH-HEAT TRANSFER-Exercise
  1. Two plates each of area A, thickness L1 and L2 thermal conductivities ...

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  2. Consider a composite slab consisting of two different materials having...

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  3. A square is made of four rods of same material one of the diagonal of ...

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  4. If the temperature difference on the two sides of a wall increases fro...

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  5. The colour of a star indicates its

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  6. The means of energy transfer in vacuum is:

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  7. Which of the following is nearest to blackbody-

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  8. Which of the following is true statement?

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  9. For a black body at temperature 727^(@)C. If the temperature of the bl...

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  10. According to Wien's law

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  11. If lambda(m) denotes the wavelength at which the radiative emission fr...

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  12. A black body at 1227^(@)C emits radiations with maximum intensity at a...

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  13. The energy radiated by a black body is directly proportional to :

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  14. If temperature becomes double, the emitted radiation will be :

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  15. Prevost's theory of heat exchange tells that a body radiates thermal e...

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  16. Reflection and absorption coefficient of a given surface at 0^@C for a...

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  17. A black metal foil is warmed by radiation from a small sphere at tempe...

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  18. A body takes 10 min to cool douwn from 62^@C to 50^@C. If the temperat...

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

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  20. According to Newton’s law of cooling, the rate of cooling of a body is...

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