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The unit of thermal conductivity is :...

The unit of thermal conductivity is :

A

`WK^-1`

B

`JK^-1`

C

WK

D

JK

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SL ARORA-Thermal Properties of Matter-Exercise
  1. In order that the heat flows from one part of a solid to another part,...

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  2. A body A of mass 0.5 kg and specific heat 0.85 is at a temperature of ...

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  3. The unit of thermal conductivity is :

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  4. The temperature gradient in a rod of 0.5 m long is 80^(@)C//m. If the ...

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  5. A body of length 1 m having cross sectional area 0.75 m^(2) has heat f...

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  6. Two rods of length d(1) and d(2) and coefficients of thermal conductiv...

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  7. Two rods are of same material and having same length and area. If heat...

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  8. The ratio of thermal conductivity of two rods of different material is...

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  9. Two rods having thermal conductivity in the ratio of 5 : 3 having equa...

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  10. Three rods of same dimensions have thermal conductivities 3K, 2k and K...

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  11. Mud houses are cooler in summer and warmer in winter because

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  12. PERFECTLY BLACK BODY

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  13. Three objects coloured black, gray and white can withstand hostile con...

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  14. The rate of cooling at 600 K, if surrounding temperature is 300 K is R...

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  15. A body initially at 80^(@)C cools to 64^(@)C in 5 minutes and to 52^(@...

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  16. The temperature of a room heated by heater is 20^@C when outside tempe...

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  17. Emissive power of a perfectly black body

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  18. Which of the following statements is wrong ?

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  19. Unit of Stefan's constant is

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  20. Two bodies are at temperature 27^(@) and 927^(@)C. The heat energy rad...

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