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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: - If λ₁ and λ₂ are the wavelengths of the first members of the Lyman and Paschen
- An electric current passes through a long straight wire
- The direction of magnetic line of force of a bar magnet is
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- The radioactivity of a certain material drops to 1/16 of the initial value in 2 hours.
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If λ₁ and λ₂ are the wavelengths of the first members of the Lyman and Paschen
- An electric current passes through a long straight wire
- The direction of magnetic line of force of a bar magnet is
- The breaking stress of a wire depends upon
- The radioactivity of a certain material drops to 1/16 of the initial value in 2 hours.
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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