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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 block of wood weighs 10 N and is resting on an inclined plane. The coefficient
- In Moseley’s law √ν=a(z-b), the values of the screening constant for K-series
- For non-conductors, the energy gap is
- A 10 micro farad capacitor is charged to 500 V and then its plates are joined
- A small block of super dense material has mass 3 x 10²⁴ kg.It is situated at a height
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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