Which one of the following will radiate heat to a large extent?
A) White polished surface
B) White rough surface
C) Black rough surface
D) Black polished surface
E) None of the above
Correct Answer:
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Q8: Which of the following has the highest
Q9: Which of the following is wrong
A)Black surfaces
Q10: Which of the following are generally diathermanous?
A)Solids
B)Liquids
C)Gases
D)All
Q11: Longest wavelength
A)Ultraviolet rays
B)Infrared rays
C)Gamma rays
D)X-rays
E)Radio waves
Q12: All bodies above absolute zero temperature emit
Q14: In a cooling tower which mode of
Q15: A dimensionless number which is the ratio
Q16: There metal walls of same cross-sectional area
Q17: Formation of fog is due to
A)High pressure
B)Humidity
C)Temperature
Q18: The radiation from flames consists of
A)Continuous radiation
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