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A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature of 727⁰C, the rate of heat radiated in the same units will be:
Options
(a) 50
(b) 112
(c) 80
(d) 60
Correct Answer:
112
Explanation:
According to Stefan’s law, E ∞ σT⁴, T₁ = 500 K T₂ = 1000 K
E₂ / E₁ = (T₂ / T₁)⁴ = (1000 / 500)⁴ = 16
E₂ = 16 x 7 = 112 cal/ cm²s
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Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A machine gun fires 10 bullets/s,each of mass 10 g,the speed of each bullet
- The radius of curvature of a convave mirror is 24 cm and the imager is magnified
- In Young’s double silt experiment, 12 fringes are observed to be formed
- The moon’s radius is 1/ 4 that of the earth and its mass is 1 / 80 times that of the earth
- In communication with help of antenna if height is doubled then the range
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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