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A body, which emits radiations of all po...

A body, which emits radiations of all possible wavelengths, is known as

A

Good conductor

B

Partial radiator

C

Absorber of photons

D

Perfectly black body

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The correct Answer is:
D
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AAKASH INSTITUTE-THERMAL PROPERTIES OF MATTER-Assignment (Section-A) Objective Type questions (one option is correct)
  1. The dimensions of thermal resistance are

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  2. The temperature of water at the surface of a deep lake is 2^@C. The te...

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  3. A body of length 1 m having cross sectional area 0.75 m^(2) has heat f...

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  4. A cylinderical rod has temperature T(1) and T(2) at its ends. The rate...

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  5. A slab consists of two parallel layers of two different materials of s...

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  6. The layers of atmosphere are heated through

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  7. The temperature gradient in a rod of 0.5 m long is 80^(@)C//m. If the ...

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  8. The ratio of thermal conductivity of two rods of different material is...

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  9. Five rods of same dimensions are arranged as shown in the figure. They...

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  10. In heat transfer, which method is based on gravitation

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  11. The process in which rate of transfer of heat maximum is .

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  12. Good absorbers of heat are

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  13. A body, which emits radiations of all possible wavelengths, is known a...

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  14. A hot and a cold body are kept in vacuum separated from each other. Wh...

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  15. According to ‘Newton’s Law of cooling’, the rate of cooling of a body ...

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  16. A liquid cools down from 70^(@)C to 60^(@)C in 5 minutes. The time tak...

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  17. If a metallic sphere gets cooled from 62^(@)C to 50^(@)C in utesmin1...

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  18. Newton's law of cooling is used in laboratory for the determination of...

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  19. It takes 10 minutes to cool a liquid from 61^(@)C to 59^(@)C. If room ...

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  20. A block of metal is heated to a temperature much higher than the room ...

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