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A metal ball of surface area 200 cm^(2)...

A metal ball of surface area `200 cm^(2)` and temperature `527^(@)C` is surrounded by a vessel at `27^(@)C` . If the emissivity of the metal is 0.4, then the rate of loss of heat from the ball is `(sigma = 5.67 xx10^(-8)J//m^(2)-s-k^(4))`

A

108W

B

168W

C

185W

D

192W

Text Solution

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The correct Answer is:
C
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-PRACTICE SET 23-Paper-1(PHYSICS & CHEMISTRY)
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  2. Two bodies are at temperature 27^(@) and 927^(@)C. The heat energy rad...

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  3. A metal ball of surface area 200 cm^(2) and temperature 527^(@)C is ...

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  4. A convex lens of focal length 30 cm produces 5 times magnified real im...

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  5. An ideal Black-body at room temperature is thrown into a furnace. It i...

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  6. A particle is vibrating simple harmonically with amplitude 'a'. The di...

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  7. A particle of mass 1 kg is moving in SHM with path length 0.01 m and a...

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  8. A body of mass 5 kg is whirled in a vertical circle by a string 1 m lo...

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  9. A wire (Y=2xx10^(11)N//m has length 1m and area 1mm^(2). The work requ...

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  10. If the surface tension of water is 0.06 Nm, then the capillary rise in...

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  11. An open tube is in resonance with string (frequency of vibration of tu...

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  12. The instantaneous acceleration of a particle executing SHM given by y=...

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  13. The resolving power of a telescope whose lens has a diameter of 1.22 m...

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  14. Which one of the following is not a fundamental SI unit?

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  15. The speed of sound in air is 320 m/s. The fundamental frequency of an ...

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  16. When the angle of incidence on a material is 60^(@), the reflected lig...

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  17. In a ircuit shown in figure, the potential difference across the capac...

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  18. Long distance short-wave radio broadcasting uses

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  19. The dimensional formula for inductance is

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  20. If the pressure at half of the lake is equal to 1/3 pressure at the bo...

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