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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 mean distance between the atoms of iron is 3 x 10⁻¹⁰ m and interatomic force
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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 mean distance between the atoms of iron is 3 x 10⁻¹⁰ m and interatomic force
- Which of the following transitions in hydrogen atoms emit photons of highest frequency?
- If a magnetic substance is kept in a magnetic field, then which of the following
- A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of 10⁻⁵ Wb.
- In an inductor when current changes from 2 A to 18 A in 0.05 sec, the e.m.f. induced
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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