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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
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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 wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00
- Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series
- A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature
- A cyclist is riding with a spped of 27 km/h.As he approaches a circular turn
- In the adiabatic compression, the decrease in volume associated with
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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