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The ratio of the areas of cross section ...

The ratio of the areas of cross section of two rods of different materials is 1:2 and the ratio of ther themal conductivities of their mateirals is 4: 3. On keeping equal temperature difference between the ends of theserods, the rate of conduction of heat are equal. The ratio of the lengths of the rods is

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SL ARORA-Thermal Properties of Matter-Exercise
  1. The thermal conductivity of copper is four times that of brass. Two ro...

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  2. The temperature difference between the two ends of a bar 1.0 m long is...

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  3. The ratio of the areas of cross section of two rods of different mater...

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  4. A room at 20^@C is heated by a heater of resistence 20 ohm connected t...

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  5. A pan filled with hot food cools from 94^(@)C to 86^(@)C in 2 minutes ...

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  6. A pinhole is made in a hollow sphere of radius 5cm whose inner wall is...

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  7. How much energy in radiated per minute from the filament of an incande...

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  8. A full radiator at 0^(@)C radiates energy at the rate of 3.2 xx 10^(4)...

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  9. To what temperature must a black body be raised in order to double tot...

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  10. The temperature of a body in increased from 27^(@)C to 127^(@)C. By wh...

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  11. A black body initially at 27^(@)C is heated to 327^(@)C is heated to 3...

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  12. An electric bulb with tungsten filament having an area of 0.25 cm^(2) ...

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  13. A sphere of radius 10 cm is hung inside an oven walls are at a tempera...

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  14. A body which has a surface area5.00 cm^(2) and a temperature of 727^(@...

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  15. A metal ball of surface area 200 cm^(2) and temperature 527^(@)C is ...

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  16. Experimental investigations show that the intensity of solar radiat...

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  17. The temperature of an ordinary electric bulb is round 3000 K. At what ...

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  18. A furnace is at a temperature of 2000K. At what wavelength does it emi...

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  19. MICROSCOPE

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  20. What is dynamical theory of heat ?

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