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NARAYNA-TRANSMISSION OF HEAT-C .U .Q
- Which of the following statements is wrong ?
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- The physical factor distinguishes thermal radiation from visible light...
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- If we place our hand below a lighted electric bulb We feel warmer beca...
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- Heating effect of the incoming solar radiation is maximum at local noo...
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- The absorptivity of Lamp black and platinum black is .
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- Absorptive power of a white body and of a perfectly black body respect...
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- Three bodies A,B,C are at -27^(@)C, 0^(@)C, 100^(@)C respectively The ...
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- At high temperature black body spectrum is .
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- A black body emits
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- The best laboratory approximation to an ideal black body is .
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- A black body does not .
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- If the amount of heat energy received per unit area from the Sun is me...
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- The colour of a star is a measure of its .
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- A polished metal plate with a rough black spot on it is heated to abou...
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- If 'p' calorie of heat energy is incident on a body and absorbs 'q' ca...
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- The velocity of heat radiation in vacuum is .
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- Distribution of enrgy in the spectrum of a black body can be correctly...
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- Four pieces of iron are heated to different are respectively red, yell...
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- A star which appears blue will be
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- If a star is colder than the Sun it appears
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