# NEET Practice Questions

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NEET, 2012

If the radius of a star is R and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q?

(a)$Q/4{\mathrm{\pi R}}^{2}\mathrm{\sigma }$

(b)${\left(Q/4{\mathrm{\pi R}}^{2}\mathrm{\sigma }\right)}^{-1/2}$

(c)${\left(4{\mathrm{\pi R}}^{2}\mathrm{Q}/\mathrm{\sigma }\right)}^{1/4}$

(d)${\left(Q/4{\mathrm{\pi R}}^{2}\mathrm{\sigma }\right)}^{1/4}$