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An iron slove, used for heating a room b...

An iron slove, used for heating a room by radiation , is more efficient if

A

its inner surface is highly polished.

B

its inner surface is covered with aluminium paint

C

its outer surface is covered with aluminium paint.

D

its outer surface is rought and black.

Text Solution

Verified by Experts

The correct Answer is:
D
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RESNICK AND HALLIDAY-HEAT-MEASUREMENT AND TRANSFER-PRACTICE QUESTIONS
  1. A metallic rod is continuously heated at its two ends, the flow of hea...

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  2. The rate of heat flow through a slab is P("cond"). If the slab thickne...

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  3. An iron slove, used for heating a room by radiation , is more efficien...

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  4. An electric stove burner of diameter 20cm is at a temperature of 250^(...

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  5. A homeowner purchases insulation for her attic rated at R-15. She want...

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  6. A 2.00 kg metal object requires 5.02 xx 10^(3) J of heat to raise its...

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  7. A 0.20 kg lead ball is heated to 90.0^(@)C and dropped into an ideal c...

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  8. A gold sphere has a radius of 1.000 cm at 25.0^(@)C. If 7650 J of heat...

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  9. Heat is added to a substance, but its temperature does not rise. Which...

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  10. Which would cause a more serious burn 30g of steam or 30g of liquid wa...

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  11. Determine the leatent heat of vaporization of unknonw substance X in k...

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  12. Which one of the following statements best explains why convection doe...

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  13. Suppose you are sitting next to a fireplace in which there is a fire b...

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  14. The ends of a cylinder steel rod are maintained at two different tempe...

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  15. A cabin has a 0.159 m thick wooden floor [k = 0.14] W//(m.""^(@)C )] w...

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  16. Which object will emit more electromagnetic radiation than it absorbs ...

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  17. Two identical solid spheres have the same temperature.One of the spher...

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  18. Which one of the following graphs shows the rate at which heat is emit...

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  19. Assuming a filament in a 100W light bulb acts like a perfect blackbody...

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  20. Object A has an emissivity of 0.95, and its temperature is 25^(@)C .At...

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