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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
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An object is 8 cm high. It is desired to form a real image 4 cm high at 60 cm from
- An α-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic
- When a sound wave of wavelength λ is propagating in a medium,
- A boat is sent across a river with a velocity of 8 km/h.If the resultant velocity
- The excess pressure inside one soap bubble is three times that inside a second soap bubble
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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