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NEET Sample Paper NEET Sample Test Paper-30

  • question_answer
    The temperature of the black body increase from T to 2T. The factor by which the rate of emission will increase is:

    A)  4                    

    B)  2

    C)  16            

    D)  8

    Correct Answer: C

    Solution :

    According to Stefan's law for radiated energy \[E\propto {{T}^{4}}\] For two cases we have,             \[\frac{{{E}_{1}}}{{{E}_{2}}}=\frac{T_{1}^{4}}{T_{2}^{4}}\] Here,          \[{{T}_{1}}=T,\,{{T}_{2}}=2T\]             \[\frac{{{E}_{1}}}{{{E}_{2}}}={{\left( \frac{T}{2T} \right)}^{4}}=\frac{1}{16}\]             \[{{E}_{2}}=16{{E}_{1}}\]           


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