Q. If we consider solar system consisting of the earth and sun only as one of the ideal thermodynamic system. The sun works as source of energy having temperature $6000\ K$ and the earth as sink having temperature $300K$, the efficiency of solar system would be on the basis of exchange of radiations

A) 30%
B) 65%
C) 75%
D) 95%
Explanation

(d) $T_{1} = 6000\ K,\ T_{2} = 300\ K$
$\eta = 1 - \frac{T_{2}}{T_{1}} = 1 - \frac{300}{6000} = 0.95 \Rightarrow 95\%$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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