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If the radius and length of a copper rod...

If the radius and length of a copper rod are both doubled, the rate of flow of heat along the rod increases

A

4 times

B

2 times

C

8 times

D

16 times

Text Solution

Verified by Experts

The correct Answer is:
B
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ERRORLESS -TRANSMISSION OF HEAT-ET Self Evaluation Test
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  2. A rod of 40 cm in length and temperature difference of 80^(@)C at its ...

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  3. Two vessels of different materials are similar in size in every respec...

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  4. In a steady state of thermal conduction, temperature of the ends A and...

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  5. Four rods of silver, copper, brass and wood are of same shape. They ar...

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  6. The two opposite faces of a cubical piece of iron (thermal conductivit...

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  7. Wein's constant is 2892xx10^(-6) MKS unit and the value of lambda(m) f...

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  8. If at temperature T(1) = 1000 K the wavelength is 1.4 xx 10^(-6)m then...

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  9. The wavelength of maximum intensity of radiation emitted by a star is ...

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  10. Two friends A and B are waiting for another friend for tea. A took the...

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  11. There are two spherical balls A and B of the same material with same s...

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  12. Five identical rods are joined as shown in figure. Point A and C are ...

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  13. We cannot boil water inside the earth's satellite. Explain.

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  14. In the following figure, two insulating sheets with thermal resistance...

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  15. The top of an insulated cylindrical container is covered by a disc hav...

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  16. Figure. Shows two air filled bulbs connected by a U-tube partly filled...

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  17. Two conducting rods A and B of same length and cross-sectional area ar...

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  18. The area of the glass of a window of a room is 10 m^(2) and thickness ...

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  19. The spectrum from a black body radiation is a

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  20. The Wien’s displacement law express relation between

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  21. A black body is heated from 27^(@)C to 127^(@)C. The ratio of their en...

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