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A black body is at 727⁰C. It emits energy at a rate which is proportional to
Options
(a) (1000)⁴
(b) (1000)²
(c) (727)⁴
(d) (727)²
Correct Answer:
(1000)⁴
Explanation:
According to Stefan’s law, E α T⁴
E α (t + 273)⁴ K [723⁰C = (727 + 273)K]
E α (727 + 273)⁴ K
E α (1000)⁴ K
Related Questions: - The electric field in a certain region is acting radially outward and is given by E=Ar.
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
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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 electric field in a certain region is acting radially outward and is given by E=Ar.
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
- The inductive reactance of an inductor of 1/π henry at 50 Hz frequency is
- A body of mass m is thrown upwards at an angle θ with the horizontal with velocity
- Calculate the focal length of a reading glass of a person, if the distance
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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