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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
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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 wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof
- The ratio of speed of an electron in ground state in Bohr’s first orbit of hydrogen atom
- Two bodies of masses m₁ and m₂ are initially at rest at infinite distance apart
- An electric charge 10⁻³ μC is placed at the origin (0,0) of X-Y co-ordinate system.
- Four indentical thin rods each of mass M and length l, form a square frame
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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