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If the temperature difference on the two...

If the temperature difference on the two sides of a wall increases from `100^(@) C` to `200^(@)C`, its thermal conductivity

A

remains unchanged

B

is doubled

C

is halved

D

becomes four times

Text Solution

Verified by Experts

The correct Answer is:
A
Thermal conductivity depends so the material, not on temperature difference
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RESONANCE ENGLISH-HEAT TRANSFER-Exercise
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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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