| ⇦ | 
| ⇨ |
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: - ln a surrounding medium of temperature 10⁰C a body takes 7 min for a fall
- In an electrical circuit R,L,C and an AC voltage source are all connected in series.
- The difference in the variation of resistance with temperature in a metal
- A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes
- In which case positive work has to be done in seperating them?
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- ln a surrounding medium of temperature 10⁰C a body takes 7 min for a fall
- In an electrical circuit R,L,C and an AC voltage source are all connected in series.
- The difference in the variation of resistance with temperature in a metal
- A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes
- In which case positive work has to be done in seperating them?
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