| ⇦ | 
| ⇨ |
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: - Angle of contact of a liquid with a solid depends on
- A siren emitting sound of frequency 800 Hz is going away from a static listener
- For a parallel beam of monochromatic light of wavelength λ diffraction is produced
- An electron in a circular orbit of radius 0.05 nm performs 10¹⁶ rev/s. The magnetic
- A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms⁻¹.
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Angle of contact of a liquid with a solid depends on
- A siren emitting sound of frequency 800 Hz is going away from a static listener
- For a parallel beam of monochromatic light of wavelength λ diffraction is produced
- An electron in a circular orbit of radius 0.05 nm performs 10¹⁶ rev/s. The magnetic
- A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms⁻¹.
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