| ⇦ | 
| ⇨ |
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 work of 146 kJ is performed in order to compress one kilo mole fo gas adiabatically
- A ball is thrown vertically downwards from a height of 20 m with an initially
- A ball of mass 2 kg and another of mass 4 kg are dropped together from
- For a thermocouple, the neutral temperature is 270⁰C when its cold junction is at 20⁰C.
- The induced emf in a coil of 10 H inductance in which current varies
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The work of 146 kJ is performed in order to compress one kilo mole fo gas adiabatically
- A ball is thrown vertically downwards from a height of 20 m with an initially
- A ball of mass 2 kg and another of mass 4 kg are dropped together from
- For a thermocouple, the neutral temperature is 270⁰C when its cold junction is at 20⁰C.
- The induced emf in a coil of 10 H inductance in which current varies
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply