2. Solved Papers
  3. BHU PMT

BHU PMT BHU PMT (Screening) Solved Paper-2010

  • question_answer
    A thin square steel plate with each side equal to 10 cm is heated by a blacksmith. The rate radiated energy by the heated plate is 1134W. The temperature of the hot steel plate is (Stefan's constant\[\sigma =5.67\times {{10}^{-8}}\]\[W\,{{m}^{-2}}{{K}^{-4}},\]emissivity of the plate = 1)

    A)  1000 K                                 

    B)  1189 K

    C)  2000 K                                 

    D)  2378 K

    Correct Answer: B

    Solution :

                     The rate of radiated energy \[E=\varepsilon \sigma A{{T}^{4}}\] or       \[1134=1\times 5.67\times {{10}^{-8}}\times {{(0.1)}^{2}}{{T}^{4}}\] Temperature,\[T=1189\text{ }K\]


You need to login to perform this action.
You will be redirected in 3 sec spinner