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A piece of iron is heated in a flame. It...

A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turms to white hot. The correct explanation for the above observation is possible by using

A

Stefan's Law

B

Wien's displacement Law

C

Kirchoff's Law

D

Newton's Law of cooling

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-THERMAL PROPERTIES OF MATTER-EXERCISE-IA
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  3. A piece of iron is heated in a flame. It first becomes dull red then b...

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  4. If rate of heat loss ((dQ)/(dt)) of two bodies of different masses are...

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  5. Ratio of rate of fall of heat to rate of fall of temperature of a body...

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  6. A beaker full of hot water is kept in a room. It cools from 80^(@)C to...

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  7. Two spheres of radii r(1)andr(2) have densities rho(1)andrho(2) and sp...

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  8. Newton's law of cooling is applicable when

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  9. According to Newton's law of cooling, the rate of cooling of a body is...

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  10. A solid at temperature T(1) is kept in an evacuated chamber at tempera...

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  11. The thermal radiation emitted by a body is proportional to T^(n) where...

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  12. Newton's law of cooling is a special case of

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  13. A hot liquid is kept in a big room. The logarithm of the numerical val...

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  14. One end of a metal rod is dipped in boiling water and the other is dip...

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  15. In summer, a mild wind is often found on the shore of a calm river. Th...

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  16. Three discs, A, B and C having radii 2 m, 4 m and 6 m respectively are...

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  17. Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm...

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  18. In which of the following process, convection does not take place prim...

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  19. Heat is associated with

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  20. 'Gulab Jamuns' (assumed to be spherical) are to be heated in an oven. ...

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