| ⇦ | 
| ⇨ |
If the radius of star is R and it acts as a black body, what would be the temperature of the star, in which the rate of energy protection is Q?
Options
(a) Q / 4 πR²σ
(b) (Q / 4 πR²σ)⁻¹/²
(c) (4 πR²Q / σ)¹/⁴
(d) (Q / 4 πR²σ)¹/⁴
Correct Answer:
(Q / 4 πR²σ)¹/⁴
Explanation:
Stefan’s law for black body radiation Q = σe AT⁴
T = [Q / σ(4πR²) ]¹/⁴ Here e= 1
A = 4πR²
Related Questions: - A concave lens of focal length f forms an image which is 1/3 times the size
- A long horizontal rod has a bead which can slide long its length
- A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by
- If capillary experiment is performed in vaccum, then a liquid under the condition
- A electric dipole is placed at an angle of 30⁰ to a non-uniform electric field.
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A concave lens of focal length f forms an image which is 1/3 times the size
- A long horizontal rod has a bead which can slide long its length
- A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by
- If capillary experiment is performed in vaccum, then a liquid under the condition
- A electric dipole is placed at an angle of 30⁰ to a non-uniform electric field.
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