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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
Related Questions: - The threshold wavelength for photoelectric emission from a material is 4800 Å.
- The radii of circular orbits of two satellites A and B of the earth, are 4R and R
- A 10 micro farad capacitor is charged to 500 V and then its plates are joined
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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
- The threshold wavelength for photoelectric emission from a material is 4800 Å.
- The radii of circular orbits of two satellites A and B of the earth, are 4R and R
- A 10 micro farad capacitor is charged to 500 V and then its plates are joined
- During negative β-decay
- Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept
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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