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Thermmal conductivity of a metal rod dep...

Thermmal conductivity of a metal rod depends on .

A

area of cross section

B

temperature gradient

C

time of flow of heat

D

all the above

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The correct Answer is:
D
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NARAYNA-TRANSMISSION OF HEAT-C .U .Q
  1. For an ideal conductor thermal resistance is .

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  2. A metal rod of area of cross section A has length L and coefficient of...

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  3. Thermmal conductivity of a metal rod depends on .

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  4. Coefficient of thermal conductivity .

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  5. If the end of metal rod is heated then the rate of flow the heat does...

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  6. In the following solids thermal conductivity is maximum for .

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  7. For a perfect insulator coefficient of thermal conductivity is .

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  8. Why is it hotter at the same distance over the top of a fire than in f...

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  9. The process in which rate of transfer of heat maximum is .

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  10. By which of the following methods could a cup of hot tea loss heat whe...

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  11. The thermal radiations are similar to .

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  12. The temperature at which a black body ceases to radiate energy is .

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  13. The intensity of energy radiated by a hot body at distance r from it v...

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  14. When a body has the same temperature as that of its surroundings

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  15. One healf of a slab of ice is covered with black cloth and the other h...

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  16. Compared to a person with white skin another person with dark skin wil...

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  17. Which of the following statements is wrong ?

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  18. The physical factor distinguishes thermal radiation from visible light...

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  19. If we place our hand below a lighted electric bulb We feel warmer beca...

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  20. Heating effect of the incoming solar radiation is maximum at local noo...

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