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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 satellite in a circular orbit of radius R has a period of 4 hours. Another satellite
- For a normal eye, the cornea of eye provides a converging power 40 D and the least
- A ray of light passes from a medium A having refractive index 1.6 to the medium
- A coil has an area of 0.05 m² and it has 800 turns. It is placed perpendicularly
- A charged oil drop is suspended in a uniform field at 3×10⁴ V/m so that it neither falls
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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