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In radiation heat energy can be transfer...

In radiation heat energy can be transferred

A

a)In presence of material medium

B

b)without any material medium

C

c)In presence of any material medium or without any material medium

D

d)All of the above.

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The correct Answer is:
C
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MBD PUBLICATION-THERMAL PROPERTIES OF MATTER (HEAT TRANSFER)-QUESTION BANK
  1. Conduction of heat takes place due to

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  2. Convection of heat takes place in

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  3. In radiation heat energy can be transferred

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  4. Radiation of light possess the following property

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  5. The material medium is not required for the propagation of heat in

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  6. If the temperation of a gas is lowered to -273^@ C . Then it,s volume ...

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  7. In a room containing air, heat can go from one place to another by

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  8. Example of diathermanous body is

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  9. What is the sum of co-efficient of absorption, reflection and transmis...

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  10. The emissivity of black body is equal to

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  11. Good conductor of heat and current is :

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  12. The co-efficient of absorption and reflection of a thin uniform plate ...

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  13. The co-efficient of reflection, coefficient of absorption and coeffici...

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  14. If an athermous body absorbs 20% of the incident radiant energy then r...

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  15. A rate of radiation of a perfectly black body at 0^@ C is X j/sec. Th...

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  16. A spherical black body with a radius of 12 cm radiates 450 W power at ...

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  17. A metal cube of each side 0.05 m long emits 0.6 kcal in 80 second. The...

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  18. A perfectly black body emits total energy of 5 xx 10^2 joules in 50 mi...

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  19. A surface has emissive power 2.4 xx 10^(-2) watt/m^2 and perfectly bla...

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  20. Emissive power of a perfectly black body at 227^@ C is Eb. Emissive po...

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