Radiation energy corresponding to the temperature T of the sun is E. If its temperature is doubled, then its radiation energy will be:
1. 32 E
2. 16 E
3. 8 E
4. 4 E
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA sphere maintained at a temperature of 600 K, has a cooling rate R in an external environment of 200 K temperature. If its temperature falls to 400 K, then its cooling rate will be:
1.
2.
3.
4. None
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor a black body at a temperature of 727ºC, its radiating power is 60 watts and the temperature of the surroundings is 227ºC. If the temperature of the black body is changed to 1227ºC then its radiating power will be:
1. 304 W
2. 320 W
3. 240 W
4. 120 W
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyUnit of Stefan's constant is:
1. Watt-m2-K4
2. Watt-m2/K4
3. Watt/m2–K
4. Watt/m2 K4
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology